-2(x-y)^ 2n -4(y-x)^2n+1
=-2(x-y)^2n +4(x-y)^ (2n+1)
=(x-y) ^2n {2(x-y)-1}
=(2x-2y-1)(x-y) ^2n
-2(x-y)的2n次方-4(y-x)的2n-1次方(n为正整数)
-2(x-y)的2n次方-4(y-x)的2n-1次方(n为正整数)
数学人气:773 ℃时间:2019-12-04 01:30:27
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