{"common":{"save":0,"post_id":"968","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"201","post_id":"968","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["3"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" <center><img src='img\/7.jpg'\/><\/center> T\u00ecm $n$ bi\u1ebft: $ 5^{n} = 125 $ <br\/> <b> \u0110\u00e1p s\u1ed1: <\/b> $ n= $ _input_","hint":" \u0110\u01b0a 125 v\u1ec1 l\u0169y th\u1eeba c\u1ee7a 5","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> T\u00ecm t\u00ecm s\u1ed1 m\u0169 c\u1ee7a m\u1ed9t l\u0169y th\u1eeba <\/b> <br\/> C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t \u0111\u01b0\u1ee3c th\u1eeba nh\u1eadn d\u01b0\u1edbi \u0111\u00e2y: <br\/> $ \\bullet $ V\u1edbi $ a \\neq 0; a \\neq \\pm 1, $ n\u1ebfu $ a^{m} = a^{n}$ th\u00ec $ m = n$ <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <br\/> Ta c\u00f3: $ 5^{n} = 125 = 5^{3} $ <br\/> Do \u0111\u00f3: $ n = 3 $ <br\/> <br\/> <span class='basic_pink'> Gi\u00e1 tr\u1ecb c\u1ee7a $n$ b\u1eb1ng $3.$ <\/span><\/span> "}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:44"},{"id":"202","post_id":"968","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["4"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" <center><img src='img\/7.jpg'\/><\/center> T\u00ecm $n$ bi\u1ebft: $ \\left(\\dfrac{3}{7}\\right)^{n}= \\dfrac{81}{2401}$ <br\/> <b> \u0110\u00e1p s\u1ed1: <\/b> $ n $= _input_","hint":" \u0110\u01b0a $\\dfrac{81}{2401}$ v\u1ec1 l\u0169y th\u1eeba c\u01a1 s\u1ed1 $ \\dfrac{3}{7}$.","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> T\u00ecm s\u1ed1 m\u0169 c\u1ee7a m\u1ed9t l\u0169y th\u1eeba <\/b> <br\/> C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t \u0111\u01b0\u1ee3c th\u1eeba nh\u1eadn d\u01b0\u1edbi \u0111\u00e2y: <br\/> $ \\bullet $ V\u1edbi $ a \\neq 0; a \\neq \\pm 1, $ n\u1ebfu $ a^{m} = a^{n}$ th\u00ec $ m = n$ <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <br\/> Ta c\u00f3: $ \\left(\\dfrac{3}{7}\\right)^{n} = \\dfrac{81}{2401} = \\left(\\dfrac{3}{7}\\right)^{4}$ <br\/> Do \u0111\u00f3: $ n = 4 $ <br\/> <br\/> <span class='basic_pink'> Gi\u00e1 tr\u1ecb c\u1ee7a $n$ b\u1eb1ng $4.$ <\/span><\/span> "}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:44"},{"id":"203","post_id":"968","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\/7.jpg'\/><\/center> T\u00ecm x, bi\u1ebft r\u1eb1ng: <br\/> $ |x| : \\left( \\dfrac{1}{3} \\right)^{2} = \\left( \\dfrac{1}{3}\\right)^{3}$","select":["A. $ x = \\pm \\left( \\dfrac{1}{3} \\right)^{5} $","B. $ x = \\dfrac{1}{243} $ ","C. $ x = -\\dfrac{1}{243} $","D. $ x = \\dfrac{1}{3} $"],"hint":" \u00c1p d\u1ee5ng: $x^{m} . x^{n} = x^{m+n}$","explain":" Ta c\u00f3: $ |x| : \\left( \\dfrac{1}{3} \\right)^{2} = \\left( \\dfrac{1}{3} \\right)^{3} \\\\ \\Rightarrow |x| =\\left( \\dfrac{1}{3} \\right)^{3} . \\left( \\dfrac{1}{3} \\right)^{2} \\\\ \\Rightarrow |x| = \\left( \\dfrac{1}{3} \\right)^{3+2} = \\left( \\dfrac{1}{3} \\right)^{5} \\\\ \\Rightarrow x = \\pm \\left( \\dfrac{1}{3} \\right)^{5}$ <br\/> V\u1eady $ x = \\pm \\left( \\dfrac{1}{3} \\right)^{5}$ <br\/> <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:44"}]}