两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为

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两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+

两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为
两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为

两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为
a=1.5
b=3

已知两条直线l1:ax-by+4=0 l2:(a-1)x+y+b=0.l1与l2平行,并且坐标原已知两条直线l1:ax-by+4=0 l2:(a-1)x+y+b=0.l1与l2平行,并且坐标原点到l1,l2的距离相等.求a,b的值 已知两条直线L1:ax-by+4=0和L2:(a-1)x+y+b=0,L1垂直L2…已知两条直线L1:ax-by+4=0和L2:(a-1)x+y+b=0,L1垂直L2,且L1过点(-3,-1).求满足条件的a,b的值. 已知两条直线l1:ax+3y-3=0,l2:4x+6y-1=0.若l1//l2,则a=? 已知两条直线L1:ax+3y-3=0,L2:4x+6y-1=0.若L1平行于L2,则a=? 已知两条直线L1:ax+3y-3=0 L2:4x+6y-1=0.若L1//L2.则a? 已知两条直线L1:aX-bY+4=0,L2:(a-1)x+y+b=0.求分别满足下列条件的a和b的值.(1)求直线L1过点(-...已知两条直线L1:aX-bY+4=0,L2:(a-1)x+y+b=0.求分别满足下列条件的a和b的值.(1)求直线L1过点(-3,-1), 已知两直线L1:ax-by+4=0,L2:(a-1)x+y+b=0.直线L1与L2平行,并且坐标原点到L1,L2的距离相等,求a,b的值拜 高二数学两直线的位置关系已知,两条直线L1:ax-by+4=0,L2:(a-1)x+y=0求满足直线L1过点 (-3,-1)并且直线L1与L2垂直的a,b的值 已知两条直线l1:ax-by+4=0,l2:(a-1)x+y+b=0,求分别满足下列条件的a,b的值已知两直线l1:ax-by+4=0,l2:(a-1)x+y+b=0.求分别满足下列条件的a,b的值.(1)直线l1过点(-3,-1),并且直线l1 已知两条直线l1:ax-by+4=0,l2:(a-1)x+y+b=0,求分别满足下列条件的a,b的值已知两直线l1:ax-by+4=0,l2:(a-1)x+y+b=0.求分别满足下列条件的a,b的值.(1)直线l1过点(-3,-1),并且直线l1 两直线l1:ax-by+b=0和l2(a-1)x+y+b=0,若l1‖l2且l1与l2的距离为根号2/2,求a,b的值 已知两直线L1:ax-by+4=0和L2:(a-1)x+y+b=0求满足下列条件的a,b值:L1已知两直线L1:ax-by+4=0和L2:(a-1)x+y+b=0求满足下列条件的a,b值:L1//L2,且坐标原点到两条直线的距离相等. 已知两直线L1:ax-by+4=0,L2:(a-1)x+y+b=0,求分别满足下列条件的a,b(1)直线L1过点(-3,-1),并且直线L1与L2垂直(2)直线L1与L2平行,并且坐标原点到L1,L2的距离相等 两条直线L1:ax+by=0,L2:(a-1)x+y+b=0,直线L1L2同时平行于x+2y+3=0则a,b值为 两直线l1:ax+by=0,l2:(a-1)x+y+b=0,若直线l1,l2同时平行于直线l:x+2y+3=0,则a,b的值为? 已知两直线L1:ax-by+4=0和L2:(a-1)x+y+b=0.若L1 // L2且坐标原点到两直线的距离相等,求a,b的值? L1:ax-by+4=0 L2:(a-1)x+y+b=0 L1、L2平行,坐标原点到两直线距离相等.求a,b解:首先,将L1与L2的表达式变形,得 L1:y=(a/b)x+4/b L2:y=(1-a)x-b 由L1平行于L2,得 a/b=1-a (斜率相等) 由坐标原点到两直线距离相等, 1.直线4X-3Y-8=0的倾斜角的平分线所在的直线方程为_______2.已知4A+5B+6=0,若直线L:AX+BY+1=0必过定点,则这个定点的坐标是_______3.已知两条直线L1:x+ysina-1=0 L2:2xsina+y+1=0,当a=___时,L1//L2,当a=___时,L1垂直于