{"common":{"save":0,"post_id":"738","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"581","post_id":"738","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"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='img\/2.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn t\u1eadp h\u1ee3p n\u00e0o g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n sao cho n + 1 l\u00e0 \u01b0\u1edbc c\u1ee7a 15?","select":["A. {1; 3; 5; 15} ","B. {3; 5; 15} ","C. {0; 2; 5} ","D. {0; 2; 4; 14} "],"hint":"Ta \u0111i t\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a n \u0111\u1ec3 15 chia h\u1ebft cho n + 1","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a n + 1 \u0111\u1ec3 15 $\\vdots$ (n + 1) <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm n d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 b\u01b0\u1edbc 1 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> \u0110\u1ec3 n + 1 l\u00e0 \u01b0\u1edbc c\u1ee7a 15 th\u00ec 15 $\\vdots$ (n + 1) <br\/> \u0110\u1ec3 15 $\\vdots$ (n + 1) $\\Rightarrow$ (n + 1) $\\in$ {1; 3; 5; 15} <br\/> V\u1edbi n + 1 = 1 $\\Rightarrow$ n = 0 <br\/> n + 1 = 3 $\\Rightarrow$ n = 2 <br\/> n + 1 = 5 $\\Rightarrow$ n = 4 <br\/> n + 1 = 15 $\\Rightarrow$ n = 14 <br\/> V\u1eady t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n \u0111\u1ec3 n + 1 l\u00e0 \u01b0\u1edbc c\u1ee7a 15 l\u00e0: {0; 2; 4; 14} <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:43"},{"id":"582","post_id":"738","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"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='img\/2.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn t\u1eadp h\u1ee3p n\u00e0o g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n sao cho n - 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 12?","select":["A. {1; 3; 6; 4; 12} ","B. {8; 6; 9; 15} ","C. {1; 2; 3; 4; 6; 12} ","D. {4; 5; 6; 7; 9; 15} "],"hint":"Ta \u0111i t\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a n \u0111\u1ec3 12 chia h\u1ebft cho n - 3","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a n - 3 \u0111\u1ec3 12 $\\vdots$ (n - 3) <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm n d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 b\u01b0\u1edbc 1 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> \u0110\u1ec3 n - 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 12 th\u00ec 12 $\\vdots$ (n - 3) <br\/> \u0110\u1ec3 12 $\\vdots$ (n - 3) $\\Rightarrow$ (n - 3) $\\in$ {1; 2; 3; 4; 6; 12} <br\/> V\u1edbi n - 3 = 1 $\\Rightarrow$ n = 1 + 3 = 4 <br\/> n - 3 = 2 $\\Rightarrow$ n = 2 + 3 = 5 <br\/> n - 3 = 3 $\\Rightarrow$ n = 3 + 3 = 6 <br\/> n - 3 = 4 $\\Rightarrow$ n = 4 + 3 = 7 <br\/> n - 3 = 6 $\\Rightarrow$ n = 6 + 3 = 9 <br\/> n - 3 = 12 $\\Rightarrow$ n = 12 + 3 = 15 <br\/> V\u1eady t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n \u0111\u1ec3 n - 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 12 l\u00e0: {4; 5; 6; 7; 9; 15} <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:43"},{"id":"583","post_id":"738","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"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='img\/4.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn t\u1eadp h\u1ee3p g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u00f3 hai ch\u1eef s\u1ed1 c\u1ee7a 64. ","select":["A. {64; 32} ","B. {16; 32} ","C. {16; 32; 64} ","D. {16; 30; 64} "],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a 64 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm ra c\u00e1c \u01b0\u1edbc c\u00f3 hai ch\u1eef s\u1ed1 t\u1eeb c\u00e1c \u01b0\u1edbc v\u1eeba t\u00ecm \u1edf b\u01b0\u1edbc 1 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: \u01af(64) = {1; 2; 4; 8; 16; 32; 64} <br\/> Trong c\u00e1c \u01b0\u1edbc tr\u00ean c\u00f3 c\u00e1c \u01b0\u1edbc c\u00f3 hai ch\u1eef s\u1ed1 l\u00e0: 16; 32; 64 <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:43"}]}