若X、Y互为相反数,计算X+2X+3X+...+100X+100Y+99Y+98Y+.Y的值
3个回答
x与y为相反数,x+y=0 2x+2y=0.100x
+100y=0 最后=0 太简单了吧
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利用等式1+2+3+……+100=5050,化简:(x^100y)(x^99y^2)(x^98y^3)……(x^2y^9