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求函数f(x)=(x^2-5x+6)/(x^2+1)的导数~
人气:410 ℃ 时间:2019-08-28 05:00:12
解答
f(x)
=1+(-5x+5)/(x^2+1)
∴f'(x)=0+[-5(x^2+1)-2x(-5x+5)]/(x^2+1)^2
=5(x^2-2x-1)/(x^2+1)^2
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