Re: [微分]

[GBRS ()]

※ 引述《king911015 (早已放棄愛上你)》之銘言：
: Given x= t+e^t, y=t+t^2, find the value of d^2y/dx^2 when t=0.

d^2y/dx^2

=d/dx(dy/dx)

先將dy/dx拆成(dy/dt)/(dx/dt)

算出為t的函數,假設為f(t)

同樣再拆成{d[f(t)]/dt}/(dx/dt)即可...

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