{"common":{"save":0,"post_id":"784","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1301","post_id":"784","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":[[1]],"list":[{"point":5,"ques":" <center><img src='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}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:50"},{"id":"1302","post_id":"784","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\/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}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:50"},{"id":"1303","post_id":"784","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":[[1]],"list":[{"point":5,"ques":" <center><img src='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}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:50"}]}