设f(x)= S0=∫02f(x)e-xdx,S1=∫24f(x-2)e-xdx,…,Sn=∫2n2n+2f(x-2n)e-xdx,求.

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问题 设f(x)=
S0=∫02f(x)e-xdx,S1=∫24f(x-2)e-xdx,…,Sn=∫2n2n+2f(x-2n)e-xdx,求

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答案S0=∫02f(x)e-xdx=∫01xe-xdx+∫12(2一x)e-xdx=(1一[*])2, 令t=x一2,则S1=e-202f(t)e-tdt=e-2S0, 令t=x一2n则Sn=e-2n02f(t)e-tdt=e-2nS0, S=[*].

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