已知函数f(x)具有任意阶导数,且f'(x)=[f(x)]^2,则当n为大于2的正整数时,f(x)的n阶导数f(n)(x)等于?
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已知函数f(x)具有任意阶导数,且f'(x)=[f(x)]^2,则当n为大于2的正整数时,f(x)的n阶导数f(n)(x)等于?
已知函数f(x)具有任意阶导数,且f'(x)=[f(x)]^2,则当n为大于2的正整数时,f(x)的n阶导数f(n)(x)等于?
已知函数f(x)具有任意阶导数,且f'(x)=[f(x)]^2,则当n为大于2的正整数时,f(x)的n阶导数f(n)(x)等于?
f'(x)=[f(x)]^2
f''(x)=[f'(x)]'={[f(x)]^2}=2f(x)*f'(x)=2f(x)*[f(x)]^2=2[f(x)]^3
f'''(x)=[f''(x)]'={2[f(x)]^3}'=6[f(x)]^2*f'(x)=6[f(x)]^2*[f(x)]^2=
6*[f(x)]^4
f(4)(x)=24[f(x)]^5
f(n)(x)=n![f(x)]^(n+1)
f'(x)=[f(x)]^2
f''(x)=2*f*f'(x)=2*[f(x)]^3
f'''(x)=2*3*f^2*f'=2*3*[f(x)]^4
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f(x)的n阶导数f(n)(x)=n!*[f(x)]^(n+1)!
有f'(x)=[f(x)]^2,可得f''(x)=([f(x)]^2)'=2f(x)*f'(x)=2f(x)^3
f'''(x)=(2f(x)^3)'=6f(x)^2*f'(x)=6f(x)^4
……
f(n)(x)=n*(n-1)f(x)^(n+1)
其实
f(x)=-1/(x+c)
c为常数
f(x)的n阶导数f(n)(x)=n![f(x)]^(n+1)
f'=f^2
f''=2f*f'=2f^3
f'''=2*3f^2f'=2*3f^4
f''''=2*3*4f^3*f'=2*3*4*f^5
......
f(n)(x)=n![f(x)]^(n+1)