d/(dt)((A(t))(12-(5A(t))/(500-t)))

解

\frac{d}{d t} ((A (t)) (12 - \frac{5 A ( t )}{500 - t}))

A (\frac{5 A t ^{2} - 5000 A t}{( - t + 500 ) ^{2}} + 12)

解答ステップ

\frac{d}{d t} ((A (t)) (12 - \frac{5 A ( t )}{500 - t}))

定数を除去:

(a \cdot f)^{'} = a \cdot f^{'}

= A \frac{d}{d t} (t (12 - \frac{5 A t}{500 - t}))

積の法則を適用:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = t, g = 12 - \frac{5 A t}{500 - t}

= A (\frac{d t}{d t} (12 - \frac{5 A t}{500 - t}) + \frac{d}{d t} (12 - \frac{5 A t}{500 - t}) t)

\frac{d t}{d t} = 1

\frac{d}{d t} (12 - \frac{5 A t}{500 - t}) = - \frac{2500 A}{( - t + 500 ) ^{2}}

= A (1 \cdot (12 - \frac{5 A t}{500 - t}) + (- \frac{2500 A}{( - t + 500 ) ^{2}}) t)

簡素化

A (1 \cdot (12 - \frac{5 A t}{500 - t}) + (- \frac{2500 A}{( - t + 500 ) ^{2}}) t) : A (\frac{5 A t ^{2} - 5000 A t}{( - t + 500 ) ^{2}} + 12)

= A (\frac{5 A t ^{2} - 5000 A t}{( - t + 500 ) ^{2}} + 12)