设f’(x)=arcsin(x-1)2,f(0)=0,求∫01f(x)dx.

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问题 设f’(x)=arcsin(x-1)2,f(0)=0,求∫01f(x)dx.

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答案01f(x)dx=∫01f(x)d(x-1)=x(x-1)f(x)|01-∫01(x-1)f’(x)dx =f(0)-∫01(x-1)f’(x)dx=-∫01(x-1)arcsin(x-1)2dx =-1/2∫01arcin(x-1)2d(x-1)2 [*]-1/2∫10arcsintdt=1/2∫01arcsintdt [*]

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