Re: [微分] 負次方微分

作者: Honor1984 (希望願望成真)   2018-10-31 20:43:16
※ 引述《white74912 (一鳴驚人)》之銘言:
: https://i.imgur.com/dA4Y7pC.jpg
: 請問一下(-1/x^2)微分,不等於-1/2x^3嗎?
: 謝謝
(x^n)' = nx^(n-1)
(-1/x^2)' = -(x^(-2))' = (-1)(-2)x^(-3)
= 2/x^3

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