求过直线3x+2y+1=0和2x-3y+5=0的交点,且垂直与直线6x-2y+5=0的直线方程.
人气:322 ℃ 时间:2019-11-13 01:53:28
解答
3x+2y+1=0和2x-3y+5=0得交点(-1,1)
6x-2y+5=0的斜率k=3
3*k=-1得k=-1/3
y=-1/3x+b 经过点(-1,1)得b=2/3
y=-1/3x+2/3 即x+3y-2=0
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