{"common":{"save":0,"post_id":"7037","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4749","post_id":"7037","mon_id":"1158924","chapter_id":"1159141","question":"<p>H&agrave;m s\u1ed1 y = tanx \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$(0;\\pi)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$(\\pi;2\\pi)$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\bigg(-\\dfrac{\\pi}{2};\\pi \\bigg)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\bigg(\\dfrac{3\\pi}{2};\\dfrac{5\\pi}{2} \\bigg)$<\/span>"],"correct":"4","level":"2","hint":"","answer":"<p>H&agrave;m s\u1ed1 y = tanx \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(-\\dfrac{\\pi}{2}+k\\pi;\\dfrac{\\pi}{2}+k\\pi \\bigg)$<\/span> v\u1edbi k&nbsp;&isin; R.<\/p><p>V\u1edbi k = 2, ta c&oacute; kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(\\dfrac{3\\pi}{2};\\dfrac{5\\pi}{2} \\bigg)$<\/span>.<\/p><p>V\u1eady h&agrave;m s\u1ed1 y = tanx \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng <span class=\"math-tex\">$\\bigg(\\dfrac{3\\pi}{2};\\dfrac{5\\pi}{2} \\bigg)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.&nbsp;<\/strong><span class=\"math-tex\">$\\bigg(\\dfrac{3\\pi}{2};\\dfrac{5\\pi}{2} \\bigg)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-19 09:12:20","option_type":"math","len":0},{"id":"4752","post_id":"7037","mon_id":"1158924","chapter_id":"1159141","question":"<p>Kh\u1eb3ng \u0111\u1ecbnh n&agrave;o <strong>\u0111&uacute;ng<\/strong> v\u1ec1 s\u1ef1 bi\u1ebfn thi&ecirc;n c\u1ee7a h&agrave;m s\u1ed1 y = |sinx| ?<\/p>","options":["<strong>A.<\/strong> H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng <span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2} \\bigg)$<\/span> v&agrave; <span class=\"math-tex\">$\\bigg(\\pi;\\dfrac{3\\pi}{2} \\bigg)$<\/span>","<strong>B.<\/strong> H&agrave;m s\u1ed1 ngh\u1ecbch bi\u1ebfn tr&ecirc;n kho\u1ea3ng <span class=\"math-tex\">$\\bigg(\\dfrac{\\pi}{2};\\dfrac{3\\pi}{2} \\bigg)$<\/span>","<strong>C.<\/strong> H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng <span class=\"math-tex\">$\\bigg(\\dfrac{-\\pi}{2};\\dfrac{\\pi}{2} \\bigg)$<\/span> v&agrave; <span class=\"math-tex\">$\\bigg(\\dfrac{\\pi}{2};\\dfrac{3\\pi}{2} \\bigg)$<\/span>","<strong>D.<\/strong> H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng <span class=\"math-tex\">$\\bigg(-\\dfrac{\\pi}{2} ;0\\bigg)$<\/span> v&agrave; <span class=\"math-tex\">$(0;\\pi)$<\/span>"],"correct":"1","level":"2","hint":"","answer":"<p>T\u1eeb \u0111\u1ed3 th\u1ecb h&agrave;m s\u1ed1 y = sinx, ta c&oacute; \u0111\u1ed3 th\u1ecb h&agrave;m s\u1ed1 y = |sinx| nh\u01b0 sau:<\/p><p><span class=\"svgedit\"><svg height=\"170\" width=\"600\" 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\" y=\"2.5\"><\/image> <\/g> <\/svg><\/span><\/p><p>T\u1eeb \u0111\u1ed3 th\u1ecb ta th\u1ea5y:<\/p><p>+ H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(\\pi;\\dfrac{3\\pi}{2} \\bigg)$<\/span> n&ecirc;n lo\u1ea1i \u0111&aacute;p &aacute;n B.<\/p><p>+ H&agrave;m s\u1ed1 ngh\u1ecbch bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(-\\dfrac{\\pi}{2} ;0\\bigg)$<\/span> n&ecirc;n lo\u1ea1i \u0111&aacute;p &aacute;n C.<\/p><p>+ H&agrave;m s\u1ed1 ngh\u1ecbch bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(\\dfrac{\\pi}{2} ;\\pi\\bigg)$<\/span> n&ecirc;n lo\u1ea1i \u0111&aacute;p &aacute;n D.<\/p><p>+ H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2} \\bigg)$<\/span> v&agrave;&nbsp;<span class=\"math-tex\">$\\bigg(\\pi;\\dfrac{3\\pi}{2} \\bigg)$<\/span> n&ecirc;n ch\u1ecdn A.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> H&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2} \\bigg)$<\/span> v&agrave;&nbsp;<span class=\"math-tex\">$\\bigg(\\pi;\\dfrac{3\\pi}{2} \\bigg)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-19 09:22:52","option_type":"math","len":0},{"id":"4754","post_id":"7037","mon_id":"1158924","chapter_id":"1159141","question":"<p>H&agrave;m s\u1ed1 <span class=\"math-tex\">$y = tanx +\\dfrac{cosx}{1+sinx}$<\/span>&nbsp;\u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$(0;\\pi)$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$(\\pi;2\\pi)$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2}\\bigg)$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\bigg(-\\dfrac{\\pi}{2};0\\bigg)$<\/span>"],"correct":"3","level":"2","hint":"","answer":"<p>H&agrave;m s\u1ed1&nbsp;<span class=\"math-tex\">$y = tanx +\\dfrac{cosx}{1+sinx}$<\/span>&nbsp;x&aacute;c \u0111\u1ecbnh khi&nbsp;<span class=\"math-tex\">$\\begin{cases}cosx\\ne0\\\\sinx\\ne-1\\end{cases}$<\/span>&nbsp;suy ra&nbsp;<span class=\"math-tex\">$cosx\\ne0$<\/span>&nbsp;suy ra&nbsp;<span class=\"math-tex\">$x\\ne \\dfrac{\\pi}{2}+k\\pi,k\\in R$<\/span><\/p><p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$y = tanx +\\dfrac{cosx}{1+sinx}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$ \\dfrac{cosx}{sinx} +\\dfrac{cosx}{1+sinx}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$ \\dfrac{sin^2x+sinx+cos^2x}{cosx(sinx+1)} $<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$ \\dfrac{1+sinx}{cosx(sinx+1)} $<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$ \\dfrac{1}{cosx} $<\/span><\/p><p>Do y = cosx ngh\u1ecbch bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng&nbsp;<span class=\"math-tex\">$(k2\\pi;\\pi+k2\\pi),k\\in R$<\/span>&nbsp;v&agrave; h&agrave;m s\u1ed1&nbsp;<span class=\"math-tex\">$y= \\dfrac{1}{cosx} $<\/span>&nbsp;x&aacute;c \u0111\u1ecbnh khi&nbsp;<span class=\"math-tex\">$x\\ne \\dfrac{\\pi}{2}+k\\pi,k\\in R$<\/span>n&ecirc;n h&agrave;m s\u1ed1&nbsp;<span class=\"math-tex\">$y= \\dfrac{1}{cosx} $<\/span>&nbsp;\u0111\u1ed3ng bi\u1ebfn tr&ecirc;n m\u1ed7i kho\u1ea3ng&nbsp;<span class=\"math-tex\">$(k2\\pi;\\dfrac{\\pi}{2}+k2\\pi),k\\in R$<\/span>&nbsp;v&agrave;&nbsp;<span class=\"math-tex\">$(\\dfrac{\\pi}{2}+k2\\pi;\\pi+k2\\pi),k\\in R $<\/span>.<\/p><p>Do \u0111&oacute; h&agrave;m s\u1ed1 \u0111&atilde; cho \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span style=\"color:#16a085;\"><\/span><span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2}\\bigg)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$\\bigg(0;\\dfrac{\\pi}{2}\\bigg)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-19 09:38:14","option_type":"math","len":0}]}