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受欢迎的微积分 >

integral of 21x^2+2

解答

\int 21 x^{2} + 2 d x

解答

7 x^{3} + 2 x + C

求解步骤

\int 21 x^{2} + 2 d x

使用积分加法定则:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int 21 x^{2} d x + \int 2 d x

\int 21 x^{2} d x = 7 x^{3}

\int 2 d x = 2 x

= 7 x^{3} + 2 x

解答补常数

= 7 x^{3} + 2 x + C

作图

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