化简(y-x)的3次方乘(x-y)的n次方+(x-y)的n+1次方乘(y-x)的平方
问题描述:
化简(y-x)的3次方乘(x-y)的n次方+(x-y)的n+1次方乘(y-x)的平方
化简(y-x)的3次方乘(x-y)的n次方+(x-y)的n+1次方乘(y-x)的平方
.明天就要交了..
答
原式=[-(x-y)]^3(x-y)^n+(x-y)^(n+1)*[-(x-y)]^2
=-(x-y)^3(x-y)^n+(x-y)^(n+1)(x-y)^2
=-(x-y)^(n+3)+(x-y)^(n+3)
=0