{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n: 3 $\\vdots$ (x - 2) l\u00e0:","select":["A. x $\\in$ {-1; 1; 3; 5}","B. x $\\in$ {-1; -3; 3; 5}","C. x $\\in$ {-1; 1; -3; 5}","D. x $\\in$ {-5; 1; 3; 5}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm t\u1eadp h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x - 2<br\/>B\u01b0\u1edbc 2: T\u00ecm x<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 3 $\\vdots$ (x - 2) $\\Rightarrow$ (x - 2) $\\in$ \u01af(3)<br\/>\u01af(3) = {-3; -1; 1; 3}<br\/>$\\Rightarrow$ (x - 2) $\\in$ {-3; -1; 1; 3}<br\/>Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau: <br\/><table><tr><th>x - 2<\/th><th>-3<\/th><th>-1<\/th><th>1<\/th><th>3<\/th><\/tr><tr><td>x<\/td><td>-1<\/td><td>1<\/td><td>3<\/td><td>5<\/td><\/tr><\/table><br\/>$\\Rightarrow$ x $\\in$ {-1; 1; 3; 5}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x $\\in$ {-1; 1; 3; 5}<\/span> <\/span> <br\/><\/span>","column":2}]}],"id_ques":1301},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/5.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n: -5 $\\vdots$ (x + 7) l\u00e0:","select":["A. x $\\in$ {12; 8; 6; 2}","B. x $\\in$ {-12; 8; -6; -2}","C. x $\\in$ {2; -8; -6; -2}","D. x $\\in$ {-12; -8; -6; -2}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm t\u1eadp h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x + 7<br\/>B\u01b0\u1edbc 2: T\u00ecm x<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> -5 $\\vdots$ (x + 7) $\\Rightarrow$ (x + 7) $\\in$ \u01af(-5)<br\/>\u01af(-5) = {-5; -1; 1; 5}<br\/>$\\Rightarrow$ (x + 7) $\\in$ {-5; -1; 1; 5}<br\/>Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau: <br\/><table><tr><th>x + 7<\/th><th>-5<\/th><th>-1<\/th><th>1<\/th><th>5<\/th><\/tr><tr><td>x<\/td><td>-12<\/td><td>-8<\/td><td>-6<\/td><td>-2<\/td><\/tr><\/table><br\/>$\\Rightarrow$ x $\\in$ {-12; -8; -6; -2}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. x $\\in$ {-12; -8; -6; -2}<\/span> <\/span> <br\/><\/span>","column":2}]}],"id_ques":1302},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/8.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n: 13 $\\vdots$ (x - 5) l\u00e0:","select":["A. x $\\in$ {-8; 4; 6; 18}","B. x $\\in$ {-18; 4; 6; 18}","C. x $\\in$ {-8; -6; 6; 18}","D. x $\\in$ {-18; -6; 6; 18}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm t\u1eadp h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x - 5<br\/>B\u01b0\u1edbc 2: T\u00ecm x<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 13 $\\vdots$ (x - 5) $\\Rightarrow$ (x - 5) $\\in$ \u01af(13)<br\/>\u01af(13) = {-13; -1; 1; 13}<br\/>$\\Rightarrow$ (x - 5) $\\in$ {-13; -1; 1; 13}<br\/>Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau: <br\/><table><tr><th>x - 5<\/th><th>-13<\/th><th>-1<\/th><th>1<\/th><th>13<\/th><\/tr><tr><td>x<\/td><td>-8<\/td><td>4<\/td><td>6<\/td><td>18<\/td><\/tr><\/table><br\/>$\\Rightarrow$ x $\\in$ {-8; 4; 6; 18}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x $\\in$ {-8; 4; 6; 18}<\/span> <\/span> <br\/><\/span>","column":2}]}],"id_ques":1303},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/6.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a 27 l\u00e0:","select":["A. {-27; -9; -3; -1; 1; 3; 9; 27}","B. {-27; -3; -1; 1; 3; 27}","C. {-27; -9; -3; 3; 9; 27}","D. {-9; -3; -1; 1; 3; 9}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(27) = {-27; -9; -3; -1; 1; 3; 9; 27}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. {-27; -9; -3; -1; 1; 3; 9; 27}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1304},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/5.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a 30 l\u00e0:","select":["A. {-30; -15; -10; -6; -5; -3; -2; 0; 2; 3; 5; 6; 10; 15}","B. {-30; -15; -10; -6; -5; -3; -2; -1; 1; 2; 3; 5; 6; 10; 15; 30}","C. {-15; -10; -6; -5; -3; -2; -1; 1; 2; 3; 5; 6; 10; 15}","D. {-30; -15; -6; -5; -3; -2; -1; 1; 2; 3; 5; 6; 15}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(30) = {-30; -15; -10; -6; -5; -3; -2; -1; 1; 2; 3; 5; 6; 10; 15; 30}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {-30; -15; -10; -6; -5; -3; -2; -1; 1; 2; 3; 5; 6; 10; 15; 30}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1305},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/4.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a -8 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 24 l\u00e0:","select":["A. {-24; -16; -8; 0; 8; 16; 24}","B. {-16; -8; 0; 8; 16}","C. {...; -24; -16; -8; 0; 8; 16; 24; ...}","D. {-24; -16; -8; 0; 8; 16; 24; ...}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a -8 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 24<br\/>$\\Rightarrow$ x $\\in$ B(-8) v\u00e0 |x| < 24<br\/>B(-8) = {...; -24; -16; -8; 0; 8; 16; 24; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -24; -16; -8; 0; 8; 16; 24; ...}<br\/>M\u00e0 |x| < 24<br\/> $\\Rightarrow$ x $\\in$ {-16; -8; 0; 8; 16} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {-16; -8; 0; 8; 16}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1306},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/3.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a -5 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 22 l\u00e0:","select":["A. {-20; -15; -10; -5; 5; 10; 15; 20}","B. {...;-20; -15; -10; -5; 0; 5; 10; 15; 20}","C. {-20; -15; -10; -5; 0; 5; 10; 15; 20; ...}","D. {-20; -15; -10; -5; 0; 5; 10; 15; 20}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a -5 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 22<br\/>$\\Rightarrow$ x $\\in$ B(-5) v\u00e0 |x| < 22<br\/>B(-5) = {...; -25; -20; -15; -10; -5; 0; 5; 10; 15; 20; 25; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -25; -20; -15; -10; -5; 0; 5; 10; 15; 20; 25; ...}<br\/>M\u00e0 |x| < 22<br\/> $\\Rightarrow$ x $\\in$ {-20; -15; -10; -5; 0; 5; 10; 15; 20} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. {-20; -15; -10; -5; 0; 5; 10; 15; 20}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1307},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft:<br\/> -5.(x - 1) = 30","select":["A. x = 5","B. x = -5 ","C. x = 6","D. x = -6"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Trong \u0111\u1eb3ng th\u1ee9c d\u1ea1ng a.x = b (a,b $\\in$ Z, a $\\ne$ 0) ta t\u00ecm x nh\u01b0 sau:<br\/>+ T\u00ecm gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a x: <b> |x| = $\\dfrac{|b|}{|a|}$<\/b><br\/>+ X\u00e1c \u0111\u1ecbnh d\u1ea5u c\u1ee7a x theo quy t\u1eafc \u0111\u1eb7t d\u1ea5u c\u1ee7a ph\u00e9p nh\u00e2n s\u1ed1 nguy\u00ean.<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: |x - 1| = $\\dfrac{30}{5}$ = 6<br\/>V\u00ec t\u00edch 30 l\u00e0 s\u1ed1 d\u01b0\u01a1ng n\u00ean x - 1 c\u00f9ng d\u1ea5u v\u1edbi -5<br\/>V\u1eady x - 1 = -6 <br\/>$\\Rightarrow$ x = -5 <br\/>Ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. x = -5<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1308},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft:<br\/> 3.(x + 5) = -18","select":["A. x = 1","B. x = -1 ","C. x = -11","D. x = 11"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Trong \u0111\u1eb3ng th\u1ee9c d\u1ea1ng a.x = b (a,b $\\in$ Z, a $\\ne$ 0) ta t\u00ecm x nh\u01b0 sau:<br\/>+ T\u00ecm gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a x: <b> |x| = $\\dfrac{|b|}{|a|}$<\/b><br\/>+ X\u00e1c \u0111\u1ecbnh d\u1ea5u c\u1ee7a x theo quy t\u1eafc \u0111\u1eb7t d\u1ea5u c\u1ee7a ph\u00e9p nh\u00e2n s\u1ed1 nguy\u00ean.<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: |x + 5| = $\\dfrac{18}{3}$ = 6<br\/>V\u00ec t\u00edch -18 l\u00e0 s\u1ed1 \u00e2m n\u00ean x + 5 kh\u00e1c d\u1ea5u v\u1edbi 3<br\/>V\u1eady x + 5 = -6<br\/>$\\Rightarrow$ x = -11 <br\/>Ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. x = -11<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1309},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c: <br\/>A = [93 - (20 - 7)] : 16","select":["A = 5","A = -5","A = 6","A = -6"],"hint":" ","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}A&= [93 - (20 - 7)] : 16\\\\&= ( 93 - 13) : 16\\\\&= 80 : 16\\\\&= 5\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 5<\/span><\/span> <br\/>","column":2}]}],"id_ques":1310},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c: <br\/>A = 1449 - {[(216 + 184) : 8] . 9}","select":["A = -999","A = 1899","A = 999","A = -1899"],"hint":" ","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}A&= 1449 - {[(216 + 184) : 8] . 9}\\\\&= 1449 - [(400 : 8) . 9]\\\\&= 1449 - (50 . 9)\\\\&= 1449 - 450\\\\&= 999\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 999<\/span><\/span> <br\/>","column":2}]}],"id_ques":1311},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -9 l\u00e0:","select":["A. {1; 3}","B. {0; 1; 3; 9}","C. {1; 3; 9}","D. {0; 1; 3}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(-9) = {-9; -3; -1; 1; 3; 9}<br\/>$\\Rightarrow$ T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -9 l\u00e0:<br\/>{1; 3; 9}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. {1; 3; 9}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1312},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -12 l\u00e0:","select":["A. {0; 1; 2; 3; 4; 6; 12}","B. {1; 2; 3; 4; 6; 12}","C. {1; 3; 4; 6; 12}","D. {1; 2; 3; 4; 12}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(-12) = {-12; -6; -4; -3; -2; -1; 1; 2; 3; 4; 6; 12}<br\/>$\\Rightarrow$ T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -12 l\u00e0:<br\/>{1; 2; 3; 4; 6; 12}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {1; 2; 3; 4; 6; 12}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1313},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -12 l\u00e0:","select":["A. {0; 1; 2; 3; 4; 6; 12}","B. {1; 2; 3; 4; 6; 12}","C. {1; 3; 4; 6; 12}","D. {1; 2; 3; 4; 12}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(-12) = {-12; -6; -4; -3; -2; -1; 1; 2; 3; 4; 6; 12}<br\/>$\\Rightarrow$ T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc kh\u00f4ng \u00e2m c\u1ee7a -12 l\u00e0:<br\/>{1; 2; 3; 4; 6; 12}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {1; 2; 3; 4; 6; 12}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1314},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u00ecm n, bi\u1ebft: (n - 5) $\\vdots$ (n - 1)","select":["A. n $\\in$ {-3; -1; 2; 3; 5}","B. n $\\in$ {-3; -1; 0; 2; 3; 5}","C. n $\\in$ { -1; 0; 2; 3; 5}","D. n $\\in$ {-4; -1; 0; 2; 3; 5}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: Ph\u00e2n t\u00edch n - 5 v\u1ec1 d\u1ea1ng a.(n - 1) + b, (a, b $\\in $ Z, a $\\ne$ 0)<br\/>B\u01b0\u1edbc 2: T\u00ecm n<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: n - 5 = (n - 1) + (-4)<br\/>M\u00e0 (n - 5) $\\vdots$ (n - 1)<br\/>$\\Rightarrow$ (n - 1) + (-4) $\\vdots$ (n - 1)<br\/>L\u1ea1i c\u00f3: (n - 1) $\\vdots$ (n - 1) v\u1edbi m\u1ecdi n<br\/> $\\Rightarrow$ (-4) $\\vdots$ (n - 1) hay (n - 1) $\\in$ \u01af(-4)<br\/>\u01af(-4) = {-4; -2; -1; 1; 2; 4}<br\/> $\\Rightarrow$ (n - 1) $\\in$ {-4; -2; -1; 1; 2; 4}<br\/>$\\Rightarrow$ n $\\in$ {-3; -1; 0; 2; 3; 5}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. n $\\in$ {-3; -1; 0; 2; 3; 5}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1315},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u00ecm n, bi\u1ebft: (n + 4) $\\vdots$ (n + 1)","select":["A. n $\\in$ {-5; 0; 2; 4}","B. n $\\in$ {-2; 0; 2; 4}","C. n $\\in$ {-5; -2; 0; 2}","D. n $\\in$ {-4; -2; 0; 2}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: Ph\u00e2n t\u00edch n + 4 v\u1ec1 d\u1ea1ng a.(n + 1) + b, (a, b $\\in $ Z, a $\\ne$ 0)<br\/>B\u01b0\u1edbc 2: T\u00ecm n<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: n + 4 = (n + 1) + 3<br\/>M\u00e0 (n + 4) $\\vdots$ (n + 1)<br\/>$\\Rightarrow$ (n + 1) + 3 $\\vdots$ (n + 1)<br\/>L\u1ea1i c\u00f3: (n + 1) $\\vdots$ (n + 1) v\u1edbi m\u1ecdi n<br\/> $\\Rightarrow$ 3 $\\vdots$ (n + 1) hay (n + 1) $\\in$ \u01af(3)<br\/>\u01af(3) = {-3; -1; 1; 3}<br\/> $\\Rightarrow$ (n + 1) $\\in$ {-3; -1; 1; 3}<br\/>$\\Rightarrow$ n $\\in$ {-4; -2; 0; 2}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. n $\\in$ {-4; -2; 0; 2}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1316},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u00ecm a, bi\u1ebft: 7 $\\vdots$ (2a + 5)","select":["A. a $\\in$ {-6; -3; -2; 1}","B. a $\\in$ {-6; -4; -3; 1}","C. a $\\in$ {-6; -4; -3; -1}","D. a $\\in$ {-6; -3; 2; 1}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm 2a + 5<br\/>B\u01b0\u1edbc 2: T\u00ecm a<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>7 $\\vdots$ (2a + 5)$\\Rightarrow$ (2a + 5) $\\in$ \u01af(7)<br\/> \u01af(7) = {-7; -1; 1; 7}<br\/> $\\Rightarrow$ 2a + 5 $\\in$ {-7; -1; 1; 7}<br\/> Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau:<br\/><table><tr><th>2a + 5<\/th><th>-7<\/th><th>-1<\/th><th>1<\/th><th>7<\/th><\/tr><tr><td>a<\/td><td>-6<\/td><td>-3<\/td><td>-2<\/td><td>1<\/td><\/tr><\/table><br\/>$\\Rightarrow$ a $\\in$ {-6; -3; -2; 1}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. a $\\in$ {-6; -3; -2; 1}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1317},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv2/img\/2.jpg' \/><\/center>T\u00ecm a, bi\u1ebft: -6 $\\vdots$ (a + 5)","select":["A. a $\\in$ {-1; 2; -7; -6; -4; 3; -2; 1}","B. a $\\in$ {-11; -8; -7; -6; -4; -3; 2; 1}","C. a $\\in$ {-11; -8; -7; -6; -4; -3; -2; 1}","D. a $\\in$ {-11; -8; -7; -6; -4; -3; -2; 1; 0}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm a + 5<br\/>B\u01b0\u1edbc 2: T\u00ecm a<\/span> <br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>-6 $\\vdots$ (a + 5)$\\Rightarrow$ (a + 5) $\\in$ \u01af(-6)<br\/> \u01af(-6) = {-6; -3; -2; -1; 1; 2; 3; 6}<br\/> $\\Rightarrow$ a + 5 $\\in$ {-6; -3; -2; -1; 1; 2; 3; 6}<br\/> Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau:<br\/><table><tr><th>a + 5<\/th><th>-6<\/th><th>-3<\/th><th>-2<\/th><th>-1<\/th><th>1<\/th><th>2<\/th><th>3<\/th><th>6<\/th><\/tr><tr><td>a<\/td><td>-11<\/td><td>-8<\/td><td>-7<\/td><td>-6<\/td><td>-4<\/td><td>-3<\/td><td>-2<\/td><td>1<\/td><\/tr><\/table><br\/>$\\Rightarrow$ a $\\in$ {-11; -8; -7; -6; -4; -3; -2; 1}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. a $\\in$ {-11; -8; -7; -6; -4; -3; -2; 1}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1318},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Trong c\u00e1c \u0111\u00e1p \u00e1n sau, \u0111\u00e1p \u00e1n n\u00e0o sai?","select":["A. -45 : (-5) = 9","B. -245 : 49 = 5","C. 252 : (-6) = -42","D. -100 : 5 = -20"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>S\u1ed1 \u00e2m : s\u1ed1 \u00e2m = s\u1ed1 d\u01b0\u01a1ng<br\/>S\u1ed1 \u00e2m : s\u1ed1 d\u01b0\u01a1ng = s\u1ed1 \u00e2m<br\/>S\u1ed1 d\u01b0\u01a1ng : s\u1ed1 \u00e2m = s\u1ed1 \u00e2m<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>-45 : (-5) = 9<br\/>-245 : 49 = -5<br\/>252 : (-6) = -42<br\/>-100 : 5 = -20<br\/>V\u1eady \u0111\u00e1p \u00e1n sai l\u00e0: <span class='basic_pink'> B. -245 : 49 = 5<\/span><\/span> <br\/>","column":2}]}],"id_ques":1319},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Trong c\u00e1c \u0111\u00e1p \u00e1n sau, \u0111\u00e1p \u00e1n n\u00e0o sai?","select":["A. (-200) : (-2) = 100","B. (-20) : 10 = -2","C. (-4) : (-2) = -2","D. (-50) : (-10) = 5"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>S\u1ed1 \u00e2m : s\u1ed1 \u00e2m = s\u1ed1 d\u01b0\u01a1ng<br\/>S\u1ed1 \u00e2m : s\u1ed1 d\u01b0\u01a1ng = s\u1ed1 \u00e2m<br\/>S\u1ed1 d\u01b0\u01a1ng : s\u1ed1 \u00e2m = s\u1ed1 \u00e2m<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/>(-200) : (-2) = 100<br\/>(-20) : 10 = -2<br\/>(-4) : (-2) = 2<br\/>(-50) : (-10) = 5<br\/>V\u1eady \u0111\u00e1p \u00e1n sai l\u00e0: <span class='basic_pink'> C. (-4) : (-2) = -2<\/span><\/span> <br\/>","column":2}]}],"id_ques":1320}],"lesson":{"save":0,"level":2}}