this is an easy and basic derivative question.

雲遊方丈 · 2018-11-09 04:40:14Z

this is an easy and basic derivative question.簡介

來源: 雲遊方丈於 2018-11-09 04:40:14 [檔案] [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次 (1462 bytes)

回答: 題目如下由 nanbudao 於 2018-11-04 08:33:45

This is an easy and basic derivative question.

k'(x) =((f(x))^-1)'

= -(f(x))^-2*f'(x)

so:

k'(2)= - (f(2))^-2 * f'(2)

=-4^-2 * (4.3-4)/(2.1-2)

= -9/16

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