解
4x+3y=0 A
2x-y=10 B
得
3B 6x-3y=30
A+3B 10x=30
x=3代入4x+3y=0得
y=-4
将(3,-4)代入ax+2y+8=0
3a-8+8=0
a=0抛物线x=-4分之y²的焦点坐标是?要过程。x=-1/4y²y²=-4x焦点坐标是(-1,0)
三条直线ax+2y+8=0,4x+3y=0,2x-y=10交于一点,则a=?
三条直线ax+2y+8=0,4x+3y=0,2x-y=10交于一点,则a=?
数学人气:601 ℃时间:2019-10-11 04:35:05
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