计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方

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计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方
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计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方
计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方

计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方

(y-x)³(x-y)^n+2(x-y)^(n+1)(y-x)²
=-(x-y)³(x-y)^n+2(x-y)^(n+1)(x-y)²
=-(x-y)^(n+3)+2(x-y)^(n+3)
=(x-y)^(n+3)