{"common":{"save":0,"post_id":"1404","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1221","post_id":"1404","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":" <span class='basic_left'> Thu g\u1ecdn r\u1ed3i s\u1eafp x\u1ebfp \u0111a th\u1ee9c sau theo l\u0169y th\u1eeba gi\u1ea3m d\u1ea7n c\u1ee7a bi\u1ebfn: <br\/> $1-6{{x}^{7}}+5{{x}^{4}}-2+13{{x}^{5}}-8{{x}^{7}}$ <\/span>","select":["A. $-1+5x^4+13x^5-14x^7$","B. $-14{{x}^{7}}+13{{x}^{5}}+5{{x}^{4}}-1$","C. $-2{{x}^{7}}+13{{x}^{5}}+5{{x}^{4}}+1$","D. $2{{x}^{7}}+13{{x}^{5}}+5{{x}^{4}}-3$"],"hint":"","explain":"<span class='basic_left'> Ta c\u00f3: <br\/> $\\begin{align} & 1-6{{x}^{7}}+5{{x}^{4}}-2+13{{x}^{5}}-8{{x}^{7}} \\\\ & =\\left( -6{{x}^{7}}-8{{x}^{7}} \\right)+13{{x}^{5}}+5{{x}^{4}}+\\left( 1-2 \\right) \\\\ & =-14{{x}^{7}}+13{{x}^{5}}+5{{x}^{4}}-1 \\\\ \\end{align}$ <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span>","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:57"},{"id":"1222","post_id":"1404","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["3"],["2"],["3"],["-8"]]],"list":[{"point":5,"width":30,"content":"","type_input":"","ques":" <span class='basic_left'>Thu g\u1ecdn r\u1ed3i s\u1eafp x\u1ebfp \u0111a th\u1ee9c sau theo l\u0169y th\u1eeba gi\u1ea3m d\u1ea7n c\u1ee7a bi\u1ebfn: <br\/> $A=4{{x}^{5}}+3x-2{{x}^{2}}-{{x}^{5}}+4{{x}^{2}}-8$ <br\/> <br\/> <b> \u0110\u00e1p \u00e1n:<\/b> $A=\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}{{x}^{5}}+\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}{{x}^{2}}+\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}x+\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}$<\/span> ","explain":"<span class='basic_left'>Ta c\u00f3: <br\/> $\\begin{align} & A=4{{x}^{5}}+3x-2{{x}^{2}}-{{x}^{5}}+4{{x}^{2}}-8 \\\\ & \\,\\,\\,\\,\\,\\,=\\left( 4{{x}^{5}}-{{x}^{5}} \\right)+\\left( -2{{x}^{2}}+4{{x}^{2}} \\right)+3x-8 \\\\ & \\,\\,\\,\\,\\,\\,=3{{x}^{5}}+2{{x}^{2}}+3x-8 \\\\ \\end{align}$ <br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $3;2;3;-8$.<\/span><\/span>"}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:57"},{"id":"1223","post_id":"1404","mon_id":"0","chapter_id":"0","question":"Kh\u1eb3ng \u0111\u1ecbnh sau \u0111\u00e2y \u0110\u00fang hay Sai","options":{"time":24,"part":[{"title":"Kh\u1eb3ng \u0111\u1ecbnh sau \u0111\u00e2y \u0110\u00fang hay Sai","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" B\u1eadc c\u1ee7a \u0111a th\u1ee9c $2y-3y^2+3y^2-2y$ l\u00e0 $2$","select":["\u0110\u00fang","Sai"],"explain":"<span class='basic_left'> Thu g\u1ecdn \u0111a th\u1ee9c: <br\/> $2y-3y^2+3y^2-2y=(-3y^2+3y^2)+(2y-2y)=0$ <br\/> $0$ l\u00e0 \u0111a th\u1ee9c kh\u00f4ng c\u00f3 b\u1eadc. <br\/> Kh\u1eb3ng \u0111\u1ecbnh c\u1ee7a \u0111\u1ec1 b\u00e0i l\u00e0 sai. <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 Sai.<\/span> <br\/> <b> Sai l\u1ea7m c\u1ea7n tr\u00e1nh:<\/b> <i> Tr\u01b0\u1edbc khi t\u00ecm b\u1eadc c\u1ee7a m\u1ed9t \u0111a th\u1ee9c, ta \u0111i thu g\u1ecdn \u0111a th\u1ee9c \u0111\u00f3 r\u1ed3i m\u1edbi t\u00ecm b\u1eadc c\u1ee7a n\u00f3. <\/i><\/span>","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:57"}]}