计算:(1)x2•xn+1-xn-2x4+xn-1•x4.(2)(x+y)2•(x+y)•(x+y)2+(x+y)2•(x+y)3.-数学

题目简介

计算:(1)x2•xn+1-xn-2x4+xn-1•x4.(2)(x+y)2•(x+y)•(x+y)2+(x+y)2•(x+y)3.-数学

题目详情

计算:
(1)x2•xn+1-xn-2x4+xn-1•x4
(2)(x+y)2•(x+y)•(x+y)2+(x+y)2•(x+y)3
题型:解答题难度:中档来源:不详

答案

(1)原式=xn+3-xn+2+xn+3=2xn+3-xn+2;

(2)原式=(x+y)5+(x+y)5=2(x+y)5.

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