设f(x)在[0,1]可导,f(0)=0,0<f′(x)<1,求证:(∫10f(x)dx)2>∫10f3(x)dx

设f(x)在[0,1]可导,f(0)=0,0<f′(x)<1,求证:(∫10f(x)dx)2>∫10f3(x)dx.

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