F'(x)=f(x), F(0)=1, f(x)F(x)=x^2+e^x, 求f(x)
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F''(x)=f(x),F(0)=1,f(x)F(x)=x^2+e^x,求f(x)F''(x)=f(x),F(0)=1,f(x)F(x)=x^2+e^x,求f(x)F''(x)=f(x),F(0)=1,f(
F'(x)=f(x), F(0)=1, f(x)F(x)=x^2+e^x, 求f(x)
F'(x)=f(x), F(0)=1, f(x)F(x)=x^2+e^x, 求f(x)
F'(x)=f(x), F(0)=1, f(x)F(x)=x^2+e^x, 求f(x)
f(x)F(x)=x^2+e^x
两边积分得
∫f(x)F(x)dx=∫(x^2+e^x)dx
∫F(x)dF(x)=∫(x^2+e^x)dx
1/2F^2(x)=x^3/3+e^x+C
F(0)=1代入得
1/2=C
1/2F^2(x)=x^3/3+e^x+1/2
F(x)=2x^3/3+2e^x+1
开方求导即可
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