#1
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¡Ó˹´ãËé $f(x) = x^{2/3}(x^2-16)$ ¨§ËÒ૵¢Í§¨Ó¹Ç¹¨ÃÔ§ $x$ ·Õè $f'(x) > 0$
Ẻ·Õè 1 àÍÒ $x^{2/3}$ ¤Ù³à¢éÒä»ã¹Ç§àÅçº $x^{8/3} - 16x^{2/3} > 0 , f'(x) = \dfrac{8}{3}x^{5/3} - \dfrac{32}{3}x^{-1/3} $ á¡éÍÊÁ¡Òà Ẻ·Õè 2 ãªé¹ÔÂÒÁ $g(x)\bullet f(x) = g'(x)f(x) + g(x)f'(x)$ ¨ÐºÔéÁÍÍ¡ÁÒÍÊÁ¡Òù֧ ¤ÓµÍºäÁèà·èҡѺẺááÍФÃѺ Ẻä˹¶Ù¡ËÃͤÃѺ
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#2
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ä´éà·èҡѹá¹è¹Í¹¤ÃѺ
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#3
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ÍéÒ§ÍÔ§:
Ẻ·Õè 2 ËÒ͹ؾѹ¸ìä´éà·èÒääÃѺ |
#4
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à·èҡѹªÑÇÃì¤ÃѺ ÅͧµÃǨÊͺ´ÕæÇèÒ¤Ô´¼Ô´µÃ§ä˹
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Analysis Topology Algebra Number thoery |
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