→ suhorng:微錯了, 4k^x微分是 4k^x log k 118.166.61.163 09/12 20:35
→ s26307722:4k*X? 118.166.171.99 09/12 22:24
→ sa11b54e:抱歉我打錯了題目是X^4-4K^3+12>=0 111.246.64.161 09/13 10:05
推 s26307722:4X^3? 4K^3根本是常數...118.166.171.105 09/13 10:46
→ s26307722:4K^3*X吧 這題目我做過...118.166.171.105 09/13 11:09
→ s26307722:還有你該注意的是 對X^4-4k^3*X+12>=0微118.166.171.105 09/13 11:36
→ s26307722:因先令f(x)=X^4-4k^3*X+12 求他的一階118.166.171.105 09/13 11:38
→ s26307722:倒數 不能直接對不等式微分118.166.171.105 09/13 11:38
→ s26307722:函數才能微分 判斷他的形狀118.166.171.105 09/13 11:38
→ s26307722:所以4X^3-4k^3>=0的寫法是錯誤的118.166.171.105 09/13 11:39
→ s26307722:我們只有要求f(x)的臨界點時118.166.171.105 09/13 11:39
→ s26307722:才會賦予f'(X)=0的條件118.166.171.105 09/13 11:40
→ sa11b54e:= =''話說我是來錯版了嗎?題目的等級好不 111.246.64.161 09/13 11:59
→ sa11b54e:樣 111.246.64.161 09/13 11:59
→ sa11b54e:感謝S大的教誨 111.246.64.161 09/13 12:03
→ s26307722:不知道我這樣的解題方式你了解嗎118.166.171.105 09/13 22:50
→ sa11b54e:回S大小弟不才看沒有那是啥解法阿哪麼高 1.165.56.156 09/14 21:24
→ sa11b54e:級 1.165.56.156 09/14 21:27
→ sa11b54e:抱歉抱歉說話方式有待加強我看不懂 1.165.56.156 09/14 21:31