2x-y=4+a
2x+3y=4a
解得x=7a/8+3/2 y=3a/4+1
x>0
7a/8+3/2>0
a>-12/7
y
已知方程组{2x-y=4+a{2x+3y=4a的解满足x>0,y
已知方程组{2x-y=4+a{2x+3y=4a的解满足x>0,y
数学人气:403 ℃时间:2020-03-23 19:06:45
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