{"common":{"save":0,"post_id":"1011","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"391","post_id":"1011","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":10,"ques":" <center><img src='img\/7.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a $ M = \\dfrac{0,1(6) + 0,(3)}{0,(3) + 1,1(6)}$ l\u00e0: ","select":["A. $3$ ","B. $0,(3)$ ","C. $\\dfrac{23}{73}$ ","D. $\\dfrac{19}{119}$"],"explain":" Ta c\u00f3: $M = \\dfrac{0,1(6) + 0,(3)}{0,(3) + 1,1(6)} \\\\ = \\dfrac{\\dfrac{16-1}{90}+\\dfrac{3}{9}}{\\dfrac{3}{9}+1+\\dfrac{16-1}{90}} \\\\ = \\dfrac{\\dfrac{1}{2}}{\\dfrac{3}{2}} \\\\ = \\dfrac{1}{3} = 0,(3)$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":4}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"},{"id":"392","post_id":"1011","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":10,"ques":" T\u00ecm $x$ bi\u1ebft: <br\/> $0,(17) : 2,(3) = x : 0,(3) $ ","select":["A. $ x = \\dfrac{17}{69} $ ","B. $ x = 9\\dfrac{51}{2300} $ ","C. $x = \\dfrac{17}{693} $","D. $x = \\dfrac{17}{231} $ "],"explain":"Ta c\u00f3: $0,(17) = \\dfrac{17}{99} \\\\ 0,(3) = \\dfrac{3}{9} = \\dfrac{1}{3} \\\\ 2,(3) = 2 + \\dfrac{3}{9} = \\dfrac{7}{3} $ <br\/> $\\Rightarrow 0,(17) : 2,(3) = x : 0,(3) $ <br\/> $ \\Rightarrow x : \\dfrac{1}{3} = \\dfrac{17}{99} : \\dfrac{7}{3} $ <br\/> $\\Rightarrow \\dfrac{1}{3}x = \\dfrac{17}{231} $ <br\/> $ \\Rightarrow x = \\dfrac{17}{231} . \\dfrac{1}{3} \\\\ \\Rightarrow x = \\dfrac{17}{693} $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> ","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"},{"id":"393","post_id":"1011","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":10,"ques":" T\u00ecm $x $ bi\u1ebft: <br\/> $\\dfrac{0,1(6)+0,(3)}{0,(3)+1,1(6)} . x = 0,(2) $ ","select":["A. $ x = \\dfrac{73}{115}$ ","B. $x = \\dfrac{2}{9}$ ","C. $x = \\dfrac{1}{3}$ ","D. $ x = 0,(6) $ "],"explain":" Ta c\u00f3: $0,1(6) = \\dfrac{16-1}{90} = \\dfrac{1}{6} \\\\ 0,(3) = \\dfrac{3}{9} = \\dfrac{1}{3} \\\\ 1,1(6) = 1 + \\dfrac{16-1}{90} = \\dfrac{7}{6} \\\\ 0,(2) = \\dfrac{2}{9} $ <br\/> $ \\Rightarrow \\dfrac{0,1(6)+0,(3)}{0,(3)+1,1(6)} . x = 0,(2) $ <br\/> $\\Leftrightarrow \\dfrac{\\dfrac{1}{6}+\\dfrac{1}{3}}{\\dfrac{1}{3}+\\dfrac{7}{6}} . x = \\dfrac{2}{9} \\\\ \\Leftrightarrow \\dfrac{\\dfrac{1}{2}}{\\dfrac{3}{2}} . x = \\dfrac{2}{9} \\\\ \\Leftrightarrow \\dfrac{1}{3}.x = \\dfrac{2}{9} \\\\ \\Leftrightarrow x = \\dfrac{2}{3} = 0,(6) $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D. <\/span><\/span> ","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"}]}