已知:x+2y=2011 求代数式{(x^+y^)-(x-y)^+2x(x+y)}/2x的值
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已知:x+2y=2011 求代数式{(x^+y^)-(x-y)^+2x(x+y)}/2x的值
已知:x+2y=2011 求代数式{(x^+y^)-(x-y)^+2x(x+y)}/2x的值
已知:x+2y=2011 求代数式{(x^+y^)-(x-y)^+2x(x+y)}/2x的值
原式化简=x+2y=2011
{(x^+y^)-(x-y)^+2x(x+y)}/2x
x^什么意思木有看懂