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f(x)=(x-3)/(x+3)求导
人气:124 ℃ 时间:2020-03-23 04:59:19
解答
f =(x-3)/(x+3)
f '=[(x-3)' (x+3)-(x-3)(x+3)']/(x+3)^2
=[(x+3)-(x-3)]/(x+3)^2
=6/(x+3)^2
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