选择题∫f'(2t)dt=? 从x积到a
来源:百度知道 编辑:UC知道 时间:2024/06/05 08:32:53
A. 2[f(x)-f(a)] B.f(2x)-f(2a) C. 2[f(2x)-f(2a)] D.1/2[f(2x)-f(2a)]
D
用分部积分公式
∫f'(2t)dt=∫f'(2t)d(2t)=1/2∫f'(y)d(y)
=1/2∫1*f'(y)d(y)=1/2【1*f(y)-0】=1/2f(2t)|t=x到a
代入得:1/2[f(2x)-f(2a)]
选B
因为f'(2t)的原函数就是f(2t)
根据积分法则 选B
选择题∫f'(2t)dt=? 从x积到a
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