{"common":{"save":0,"post_id":"984","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"831","post_id":"984","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["t","t","t","t"]],"list":[{"point":5,"ques":"C\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u1ee9ng c\u1ee7a hai \u0111\u1ea1i l\u01b0\u1ee3ng $x$ v\u00e0 $y$ \u0111\u01b0\u1ee3c cho trong b\u1ea3ng sau: <br\/> <table><tr><td>x<\/td><td>1<\/td><td>3<\/td><td>5<\/td><td>7<\/td><\/tr><tr><td>y<\/td><td>5<\/td><td>15<\/td><td>25<\/td><td>35<\/td><\/tr><\/table> <br\/> X\u00e9t c\u00e1c kh\u1eb3ng \u0111\u1ecbnh sau, kh\u1eb3ng \u0111\u1ecbnh n\u00e0o \u0111\u00fang, kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sai? ","image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":["\u0110\u1ea1i l\u01b0\u1ee3ng $y$ t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u0111\u1ea1i l\u01b0\u1ee3ng $x$","\u0110\u1ea1i l\u01b0\u1ee3ng $y$ l\u00e0 h\u00e0m s\u1ed1 c\u1ee7a \u0111\u1ea1i l\u01b0\u1ee3ng $x$","Hai \u0111\u1ea1i l\u01b0\u1ee3ng li\u00ean h\u1ec7 v\u1edbi nhau b\u1edfi c\u00f4ng th\u1ee9c $y = 5x $"],"explain":["Ta c\u00f3: $\\dfrac{5}{1} = \\dfrac{15}{3} = \\dfrac{25}{5} = \\dfrac{35}{7} = 5 $ <br\/> Do \u0111\u00f3 \u0111\u1ea1i l\u01b0\u1ee3ng $y$ t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u0111\u1ea1i l\u01b0\u1ee3ng $x$. ","<br\/>M\u1ed7i gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ea1i l\u01b0\u1ee3ng $x$ \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ea1i l\u01b0\u1ee3ng $y$ n\u00ean \u0111\u1ea1i l\u01b0\u1ee3ng $y$ l\u00e0 h\u00e0m s\u1ed1 c\u1ee7a \u0111\u1ea1i l\u01b0\u1ee3ng $x$","<br\/>C\u00f4ng th\u1ee9c: $y = 5x $ v\u1edbi $x \\in \\{1; 3; 5; 7\\} $"]}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:52"},{"id":"832","post_id":"984","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":[[2]],"list":[{"point":5,"ques":"Cho bi\u1ebft $x$ v\u00e0 $y$ l\u00e0 hai \u0111\u1ea1i l\u01b0\u1ee3ng t\u1ec9 l\u1ec7 thu\u1eadn. Khi $x = 10$ th\u00ec $y = 5 .$ Khi $x = -5$ th\u00ec gi\u00e1 tr\u1ecb c\u1ee7a $y$ l\u00e0: ","select":["A. $-10$ ","B. $-2,5$ ","C. $-3$ ","D. $-7$ "],"explain":"V\u00ec $y$ v\u00e0 $x$ t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi nhau n\u00ean $k = \\dfrac{y}{x} = \\dfrac{5}{10} = \\dfrac{1}{2} $ <br\/> Do \u0111\u00f3 hai \u0111\u1ea1i l\u01b0\u1ee3ng $y$ v\u00e0 $x$ li\u00ean h\u1ec7 v\u1edbi nhau b\u1edfi c\u00f4ng th\u1ee9c: $y = \\dfrac{1}{2}x $ <br\/> Khi $x = -5$ th\u00ec $y = \\dfrac{1}{2}.(-5) = -2,5 $ <br\/><br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span>","column":4}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:52"},{"id":"833","post_id":"984","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":"Cho bi\u1ebft hai \u0111\u1ea1i l\u01b0\u1ee3ng $x, y$ t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi nhau. H\u00e3y ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi sai. ","select":["A. $xy = m$ ($m$ l\u00e0 h\u1eb1ng s\u1ed1, $m \\neq 0 $)","B. $y = \\dfrac{m}{x} $ ($m$ l\u00e0 h\u1eb1ng s\u1ed1, $m \\neq 0 $) ","C. C\u1ea3 A v\u00e0 B \u0111\u1ec1u \u0111\u00fang. ","D. C\u1ea3 A v\u00e0 B \u0111\u1ec1u sai. "],"explain":"$x$ v\u00e0 $y$ l\u00e0 hai \u0111\u1ea1i l\u01b0\u1ee3ng t\u1ec9 l\u1ec7 ngh\u1ecbch n\u00ean ch\u00fang li\u00ean h\u1ec7 v\u1edbi nhau b\u1edfi c\u00f4ng th\u1ee9c: <br\/> $y = \\dfrac{m}{x} $ hay $xy = m $ ($m$ l\u00e0 h\u1eb1ng s\u1ed1, $m \\neq 0 $) <br\/> V\u1eady c\u1ea3 A v\u00e0 B \u0111\u1ec1u \u0111\u00fang. <br\/><br\/> <span class='basic_pink'>C\u00e2u tr\u1ea3 l\u1eddi sai 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 09:22:52"}]}