推 Elfiend:羅必達。220.139.151.157 07/04
推 GBRS:還要使用極限[sin(x^4)]/(x^4)->1,當x->0時... 60.198.69.14 07/04
推 fly2089:分子部份不會積@@" 61.227.192.137 07/04
→ GBRS:不用積拉...微積分學基本定理拿來用就好拉... 60.198.69.14 07/04
推 sunny84:分子微一次 2x．sin x^4 61.228.85.220 07/04
→ sunny84:答按是 1/3 吧 心算的 61.228.85.220 07/04
推 amymayyam:是2x^2= =140.127.179.227 07/04
推 fly2089:嗯..知道了 感謝^^ 61.227.192.137 07/04
→ amymayyam:不對 分子是sinx^4而已= =140.127.179.227 07/04
推 fly2089:答案是1/3沒錯 61.227.192.137 07/04
推 amymayyam:我覺得是-1/12耶= =140.127.179.227 07/04
推 amymayyam:要微很多次 不能用心算吧? 我微到1/6....140.127.179.227 07/04
→ amymayyam:我好像.....又算錯了= =不要管我140.127.179.227 07/04
推 fly2089:^^" 61.227.192.137 07/04
推 GBRS:不用拉...上下各微一次可以將x約掉一個變成三角極限 60.198.69.14 07/04
推 amymayyam:第一步可以詳細說明一下嗎?140.127.179.227 07/04
推 amymayyam:第一步是變成sinx^4/6x^5嗎?140.127.179.227 07/04
推 amymayyam:沒事 我忘了一件很重要的事 所以..答案是1/3140.127.179.227 07/04