{"segment":[{"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/lop7/toan/daiso/bai10/lv1/img\/4.jpg' \/><\/center> N\u1ebfu a l\u00e0 m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9 th\u00ec: ","select":["A. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean. ","B. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 nguy\u00ean. ","C. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 v\u00f4 t\u1ec9.","D. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 th\u1ef1c."],"hint":"Ta c\u00f3: $\\mathbb{N} \\subset \\mathbb{Z} \\subset \\mathbb{Q} \\subset \\mathbb{R} $","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{Q}$ l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9, l\u00e0 s\u1ed1 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u1edbi $a,b \u2208 \\mathbb{Z} , b \u2260 0$. <br\/> * $\\mathbb{Z}$ l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean, bao g\u1ed3m $\u2026,-2 ;-1 ;0 ;1 ;2 ;\u2026$ <br\/> * $\\mathbb{I}$ t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> * $\\mathbb{R}$ t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Quan h\u1ec7 gi\u1eefa c\u00e1c t\u1eadp h\u1ee3p: <br\/> $\\mathbb{N} \\subset \\mathbb{Z} \\subset \\mathbb{Q} \\subset \\mathbb{R} $ <br\/> Suy ra: N\u1ebfu a l\u00e0 m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9 th\u00ec a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 th\u1ef1c. ($ \\mathbb{Q} \\subset \\mathbb{R}$) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D. <\/span><\/span> ","column":2}]}],"id_ques":451},{"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":" Bi\u1ebft r\u1eb1ng $x + (-4,5) < y + (-4,5) $ v\u00e0 $ y + 6,8 < z + 6,8 $ <br\/> S\u1eafp x\u1ebfp c\u00e1c s\u1ed1 theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n l\u00e0: ","select":["A. $x, y, z$","B. $y, x, z$","C. $z, x, y$","D. $x, z, y$"],"explain":" Ta c\u00f3: $x + (-4,5) < y + (-4,5) \\\\ \\Rightarrow x < y (1) $ <br\/> $ y + 6,8 < z + 6,8 \\Rightarrow y < z (2)$ <br\/> T\u1eeb (1) v\u00e0 (2) suy ra $x < y < z$ <br\/> V\u1eady s\u1eafp x\u1ebfp c\u00e1c s\u1ed1 \u0111\u00e3 cho theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n l\u00e0 $x, y, z.$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span><\/span> ","column":2}]}],"id_ques":452},{"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/lop7/toan/daiso/bai10/lv1/img\/2.jpg' \/><\/center>","select":["A. $0,52(41) \\in \\mathbb{I}$ ","B. $\\mathbb{Q} \\subset \\mathbb{R}$ "],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m s\u1ed1 h\u1eefu t\u1ec9, s\u1ed1 v\u00f4 t\u1ec9, s\u1ed1 th\u1ef1c \u0111\u1ec3 v\u1eadn d\u1ee5ng gi\u1ea3i. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 0,52(41) l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n n\u00ean $0,52(41) \\notin \\mathbb{I}$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B <br\/> $\\mathbb{Q} \\subset \\mathbb{R}$ . <\/span><\/span> ","column":2}]}],"id_ques":453},{"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 s\u1ed1 l\u1edbn nh\u1ea5t trong c\u00e1c s\u1ed1 sau: <br\/> $\\sqrt{(-8)^{2}}; 8,32; \\sqrt{49}; -\\sqrt{100}$ ","select":["A. $\\sqrt{(-8)^{2}}$ ","B. $8,32$","C. $\\sqrt{49}$","D. $-\\sqrt{100}$"],"explain":" Ta c\u00f3: A. $\\sqrt{(-8)^{2}} = 8$ <br\/> C. $\\sqrt{49} = \\sqrt{7^{2}} = 7 $ <br\/> D. $-\\sqrt{100} < 0$ <br\/> Suy ra $-\\sqrt{100} < \\sqrt{49} < \\sqrt{(-8)^{2}} < 8,32 $ <br\/> V\u1eady s\u1ed1 l\u1edbn nh\u1ea5t trong 4 s\u1ed1 tr\u00ean l\u00e0: 8,32 <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":4}]}],"id_ques":454},{"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":" Ch\u1eef s\u1ed1 th\u00edch h\u1ee3p \u0111i\u1ec1n v\u00e0o \u00f4 vu\u00f4ng: $-5,07 < -5,\\square4$ l\u00e0: ","select":["A. 1; 2;...; 9 ","B. 0; 1; 2; ...; 9","C. 0","D. 0; 1"],"explain":" Ta c\u00f3 5,<b>0<\/b>7 > 5,<b>0<\/b>4 <br\/> Suy ra -5,<b>0<\/b>7 < -5,<b>0<\/b>4 <br\/> Ch\u1eef s\u1ed1 th\u00edch h\u1ee3p \u0111i\u1ec1n v\u00e0o \u00f4 vu\u00f4ng l\u00e0: 0 <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> <span class='basic_left'> <u> L\u01b0u \u00fd <\/u> <br\/> Trong hai s\u1ed1 \u00e2m, s\u1ed1 n\u00e0o c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf (l\u1edbn) h\u01a1n th\u00ec l\u1edbn (nh\u1ecf) h\u01a1n. <\/span>","column":2}]}],"id_ques":455},{"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/lop7/toan/daiso/bai10/lv1/img\/6.jpg' \/><\/center> T\u1eadp h\u1ee3p $\\mathbb{Q} \\cup \\mathbb{I}$ l\u00e0 t\u1eadp h\u1ee3p: ","select":["A. $\\mathbb{Q}$ ","B. $\\mathbb{I}$","C. $\\mathbb{R}$","D. $\\varnothing$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{Q}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9, l\u00e0 s\u1ed1 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u1edbi $a,b \u2208 \\mathbb{Z} , b \u2260 0$. <br\/> * $\\mathbb{I}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> * $\\mathbb{R}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $\\mathbb{Q} \\cup \\mathbb{I} = \\mathbb{R} $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> ","column":4}]}],"id_ques":456},{"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/lop7/toan/daiso/bai10/lv1/img\/6.jpg' \/><\/center> T\u1eadp h\u1ee3p $\\mathbb{R} \\cap \\mathbb{I}$ l\u00e0 t\u1eadp h\u1ee3p: ","select":["A. $\\mathbb{I}$ ","B. $\\mathbb{R}$","C. $\\mathbb{Q}$","D. $\\varnothing$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{R}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <br\/> * $\\mathbb{I}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $\\mathbb{I} \\subset \\mathbb{R}$$ \\Rightarrow \\mathbb{R} \\cap \\mathbb{I} = \\mathbb{I}$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span><\/span> ","column":4}]}],"id_ques":457},{"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/lop7/toan/daiso/bai10/lv1/img\/6.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a $M = \\sqrt{4+36+81}$ l\u00e0: ","select":["A. 2 + 6 + 9 ","B. $\\pm 11$","C. 11"],"explain":" Ta c\u00f3: $M = \\sqrt{4+36+81} \\\\ = \\sqrt{121} \\\\ = 11 $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> ","column":3}]}],"id_ques":458},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["27"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"T\u00ecm $x$ bi\u1ebft r\u1eb1ng 3.(10 + x) = 111 ; x = _input_","explain":" Ta c\u00f3: $3.(10 + x) = 111 \\\\ \\Rightarrow 10 + x = \\dfrac{111}{3} = 37 \\\\ \\Rightarrow x = 37 - 10 = 27 $ <br\/> <br\/> <span class='basic_pink'> Gi\u00e1 tr\u1ecb c\u1ee7a $x$ b\u1eb1ng 27. <\/span><\/span>"}]}],"id_ques":459},{"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 r\u1eb1ng $3.(10x) = 111 $ ","select":["A. $x = 7,3 $ ","B. $x = 3,7 $","C. $x = \\dfrac{10}{37} $","D. $x = \\dfrac{1}{37} $"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> \u0110\u01b0a v\u1ec1 d\u1ea1ng: $ax = b \\Rightarrow x = \\dfrac{b}{a}$ <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $3.(10x) = 111 \\\\ \\Rightarrow 30x = 111 \\\\ \\Rightarrow x = \\dfrac{111}{30} = 3,7 $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":2}]}],"id_ques":460},{"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":" So s\u00e1nh c\u00e1c s\u1ed1 th\u1ef1c: <br\/> 2,(15) v\u00e0 2,(14) ","select":[" > "," = "," < "],"explain":" Ta c\u00f3: 2,(15) = 2,1<b>5<\/b>1515... > 2,(14) = 2,1<b>4<\/b>1414 <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 ''>''. <\/span><\/span> ","column":3}]}],"id_ques":461},{"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":" So s\u00e1nh c\u00e1c s\u1ed1 th\u1ef1c: <br\/> -0,2673 v\u00e0 - 0,267(3) ","select":[" > "," = "," < "],"explain":" Ta c\u00f3: 0,2673 = 0,2673<b>0<\/b>00.. < 0,267(3) = 0,2673<b>3<\/b>333... <br\/> Suy ra $ -0,2673 > -0,267(3) $<br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 > <\/span><\/span> <span class='basic_left'> <u> L\u01b0u \u00fd <\/u> <br\/> Trong hai s\u1ed1 \u00e2m, s\u1ed1 n\u00e0o c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf (l\u1edbn) h\u01a1n th\u00ec s\u1ed1 \u1ea5y l\u1edbn (nh\u1ecf) h\u01a1n. <\/span> ","column":3}]}],"id_ques":462},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["0"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" T\u00ednh b\u1eb1ng c\u00e1ch h\u1ee3p l\u00ed: A = [9,5 + (-13)] + [(-5) + 8,5] = _input_ ","hint":"Ph\u00e1 ngo\u1eb7c r\u1ed3i nh\u00f3m l\u1ea1i m\u1ed9t c\u00e1ch h\u1ee3p l\u00ed.","explain":" Ta c\u00f3: $A = [9,5 + (-13)] + [(-5) + 8,5] \\\\ = 9,5 - 13 - 5 + 8,5 \\\\ = (9,5 + 8,5) - (13 + 5) \\\\ = 18 - 18 \\\\ = 0 $ <br\/> <br\/> <span class='basic_pink'> K\u1ebft qu\u1ea3 l\u00e0 0. <\/span><\/span>"}]}],"id_ques":463},{"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":"S\u1eafp x\u1ebfp c\u00e1c s\u1ed1 th\u1ef1c $-3,2; 1; -\\dfrac{1}{2}; 7,4; 0; -1,5$ theo th\u1ee9 t\u1ef1 t\u1eeb nh\u1ecf \u0111\u1ebfn l\u1edbn th\u00ec:","select":["A. $-\\dfrac{1}{2} < -1,5 < -3,2 < 0 < 1 < 7,4$ ","B. $-3,2 < -1,5 < -\\dfrac{1}{2} < 0 < 1 < 7,4$ ","C. $-3,2 < -\\dfrac{1}{2} < -1,5 < 0 < 1 < 7,4$"],"explain":" Ta c\u00f3: $-3,2 < -1,5 < -\\dfrac{1}{2} < 0 < 1 < 7,4$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":1}]}],"id_ques":464},{"time":24,"part":[{"title":"\u0110i\u1ec1n ch\u1eef s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["0"]]],"list":[{"point":5,"width":20,"type_input":"","ques":" $-3,02 < -3, _input_ 1$ ","explain":" Ta c\u00f3 3,<b>02<\/b> > 3,<b>01<\/b> <br\/> Suy ra -3,<b>02<\/b> < -3,<b>01<\/b> <br\/> <br\/> <span class='basic_pink'> Gi\u00e1 tr\u1ecb ph\u1ea3i \u0111i\u1ec1n l\u00e0 : 0 <\/span><\/span> <span class='basic_left'> <u> L\u01b0u \u00fd <\/u> <br\/> Trong hai s\u1ed1 \u00e2m, s\u1ed1 n\u00e0o c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf (l\u1edbn) h\u01a1n th\u00ec s\u1ed1 \u1ea5y l\u1edbn (nh\u1ecf) h\u01a1n. <\/span>"}]}],"id_ques":465},{"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/lop7/toan/daiso/bai10/lv1/img\/4.jpg'\/><\/center> Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: ","select":["A. $\\mathbb{I} \\subset \\mathbb{R}$ ","B. $\\mathbb{R} \\subset \\mathbb{Z}$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{I}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> * $\\mathbb{R}$ t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <br\/> * $\\mathbb{Z}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean, bao g\u1ed3m $\u2026,-2 ;-1 ;0 ;1 ;2 ;\u2026$ <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $\\mathbb{Z} \\subset \\mathbb{R}$ <br\/> Suy ra ph\u01b0\u01a1ng \u00e1n B sai. <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A $\\mathbb{I} \\subset \\mathbb{R}$ <\/span><\/span> ","column":2}]}],"id_ques":466},{"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/lop7/toan/daiso/bai10/lv1/img\/4.jpg'\/><\/center> Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: ","select":["A. $-2,53 \\in \\mathbb{Q}$ ","B. $0,2(35) \\in \\mathbb{I}$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{Q}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9, l\u00e0 s\u1ed1 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u1edbi $a,b \u2208 \\mathbb{Z} , b \u2260 0$. <br\/> * $\\mathbb{I}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $-2,53 = \\dfrac{-253}{100} \\in \\mathbb{Q}$ <br\/> $0,2(35)$ l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n n\u00ean $0,2(35) \\notin \\mathbb{I}$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span><\/span> ","column":2}]}],"id_ques":467},{"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/lop7/toan/daiso/bai10/lv1/img\/4.jpg'\/><\/center> S\u1ed1 v\u00f4 t\u1ec9 v\u00e0 s\u1ed1 h\u1eefu t\u1ec9 \u0111\u01b0\u1ee3c g\u1ecdi chung l\u00e0 s\u1ed1 th\u1ef1c. ","select":[" \u0110\u00fang "," Sai "],"explain":" <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 \u0110\u00fang. <\/span><\/span> ","column":2}]}],"id_ques":468},{"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/lop7/toan/daiso/bai10/lv1/img\/2.jpg'\/><\/center> T\u1eadp h\u1ee3p s\u1ed1 th\u1ef1c k\u00ed hi\u1ec7u l\u00e0? ","select":["A. $\\mathbb{Q}$ ","B. $\\mathbb{R}$","C. $\\mathbb{I}$"],"explain":" Ta c\u00f3: $\\mathbb{Q}$: k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9. <br\/> $\\mathbb{R}$: k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c. <br\/> $\\mathbb{I}$: k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":3}]}],"id_ques":469},{"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":" Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y l\u00e0 sai? ","select":["A. $ 3 \\in \\mathbb{Q}$ ","B. $ 3 \\in \\mathbb{R}$","C. $ 3 \\in \\mathbb{I}$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{Q}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9, l\u00e0 s\u1ed1 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u1edbi $a,b \u2208 \\mathbb{Z} , b \u2260 0$. <br\/> * $\\mathbb{R}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <br\/> * $\\mathbb{I}$ k\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Kh\u1eb3ng \u0111\u1ecbnh sai l\u00e0 C. V\u00ec $3 \\notin \\mathbb{I}$ <br\/> <br\/> <span class='basic_pink'> Ch\u1ecdn \u0111\u00e1p \u00e1n C. <\/span><\/span> ","column":3}]}],"id_ques":470}],"lesson":{"save":0,"level":1}}