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最佳答案:F(x)=∫ydx=∫√(1-x^2)dx令x=sint,则√(1-x^2)=cost,dx=costdt,从而∫√(1-x^2)dx=∫cost^2dt=∫[
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最佳答案:(2/3)x^(3/2) +C(x^4)/4 +C(3/2)x² +C-e^(-x) +C