derivative of 5x^7sin(x)

解

\frac{d}{d x} (5 x^{7} sin (x))

5 (7 x^{6} sin (x) + cos (x) x^{7})

解答ステップ

\frac{d}{d x} (5 x^{7} sin (x))

定数を除去:

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

= 5 \frac{d}{d x} (x^{7} sin (x))

積の法則を適用:

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

f = x^{7}, g = sin (x)

= 5 (\frac{d}{d x} (x^{7}) sin (x) + \frac{d}{d x} (sin (x)) x^{7})

\frac{d}{d x} (x^{7}) = 7 x^{6}

\frac{d}{d x} (sin (x)) = cos (x)

= 5 (7 x^{6} sin (x) + cos (x) x^{7})