integral of (-2)(7x)

解答

\int (- 2) (7 x) d x

- 7 x^{2} + C

求解步骤

\int (- 2) \cdot 7 x d x

提出常数:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= (- 2) \cdot 7 \cdot \int x d x

化简

= (- 14) \cdot \int x d x

使用幂法则

= (- 14) \frac{x ^{2}}{2}

化简

(- 14) \frac{x ^{2}}{2} : - 7 x^{2}

= - 7 x^{2}

解答补常数

= - 7 x^{2} + C

\int y^{2} cos (x) - 3 x^{2} y - 2 x d x

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t an g e n t f (x) = 10 - 4 e^{x}, (0, 6)

\frac{d}{d x} (sin (4))

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