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人気のある微分積分 >

d/(dr(t))((s-r(t))/t)

解

\frac{d ^{2}}{d r ( t ) d t} (\frac{s - r ( t )}{t})

解

\frac{1}{t ^{2}}

解答ステップ

\frac{d ^{2}}{d r ( t ) d t} (\frac{s - r ( t )}{t})

\frac{d}{d r ( t )} (\frac{s - r ( t )}{t}) = - \frac{1}{t}

= \frac{d}{d t} (- \frac{1}{t})

\frac{d}{d t} (- \frac{1}{t}) = \frac{1}{t ^{2}}

= \frac{1}{t ^{2}}

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