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2^(x+y)=x+y...求导来过程...
人气:137 ℃ 时间:2020-05-04 13:50:52
解答
2^(x+y)=x+y
(ln2)(x+y) (1+y') = 1+y'
y'((x+y)ln2 -1) = (1- (x+y)ln2)
y' = -1
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