hatsu
幼苗
共回答了13个问题采纳率:84.6% 举报
4x+2m=3x+1
4x-3x=1-2m
x=1-2m
3x+2m=6x+1
6x-3x=2m-1
3x=2m-1
x=(2m-1)/3
方程4x+2m=3x+1和方程3x+2m=6x+1的解相同
则1-2m=(2m-1)/3
3-6m=2m-1
m=1/2
(m+2)^2006× (7/5-2m)^2007
=(1/2+2)^2006× (7/5-2×1/2)^2007
=(5/2)^2006×(2/5)^2007
=(5/2×2/5)^2006×(2/5)
=1^2006×2/5
=2/5
1年前
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