已知x+yx=4,则x+2y2x-y=______.-数学

题目简介

已知x+yx=4,则x+2y2x-y=______.-数学

题目详情

已知
x+y
x
=4
,则
x+2y
2x-y
=______.
题型:填空题难度:中档来源:不详

答案

class="stub"x+y
x
=1+class="stub"y
x
=4,class="stub"y
x
=3,则class="stub"x+2y
2x-y
=
1+class="stub"2y
x
2-class="stub"y
x
=class="stub"1+2×3
2-3
=-7.

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