derivative x^{7cos(x)}

解

導関数

x^{7 c o s (x)}

7 x^{7 c o s (x)} (- sin (x) ln (x) + \frac{cos ( x )}{x})

解答ステップ

\frac{d}{d x} (x^{7 c o s (x)})

指数の規則を適用する:

a^{b} = e^{b l n (a)}

x^{7 c o s (x)} = e^{7 c o s (x) l n (x)}

= \frac{d}{d x} (e^{7 c o s (x) l n (x)})

連鎖法則を適用:

e^{7 c o s (x) l n (x)} \frac{d}{d x} (7 cos (x) ln (x))

= e^{7 c o s (x) l n (x)} \frac{d}{d x} (7 cos (x) ln (x))

\frac{d}{d x} (7 cos (x) ln (x)) = 7 (- sin (x) ln (x) + \frac{cos ( x )}{x})

= e^{7 c o s (x) l n (x)} \cdot 7 (- sin (x) ln (x) + \frac{cos ( x )}{x})

e^{7 c o s (x) l n (x)} = x^{7 c o s (x)}

= 7 x^{7 c o s (x)} (- sin (x) ln (x) + \frac{cos ( x )}{x})