1) x-2y-6=0 and 3x+y-4=0 and ax+4y+a2 =0 are concurrent then a 2 is ?? a) 2 b)4 c)-1/2 d)-4 e)0 2) point (a+1,1) , (2a+1,3) and (2a+2,2a) are collinear then value of a is a) 2 b)4 c)-1/2 d)-4 e)0 3)line x+y-1-a=0 passing through intersection of x-y+1=0 and 3x+y-5=0 are perpendicular to one of them find value of a? a) 2 b)4 c)-1/2 d)-4 e)0 4)if line y-x-1+a=0 is equally inclined to axes and equidistant from points(1,-2) and (3,4) then a is? a) 2 b)4 c)-1/2 d)-4 e)0

1) x-2y-6=0 and 3x+y-4=0 and ax+4y+a2 =0 are concurrent then a 2 is ??
a) 2
b)4
c)-1/2
d)-4
e)0

2) point (a+1,1) , (2a+1,3) and (2a+2,2a) are collinear then value of a is
a) 2
b)4
c)-1/2
d)-4
e)0

3)line x+y-1-a=0 passing through intersection of x-y+1=0 and 3x+y-5=0 are perpendicular to one of them find value of a?
a) 2
b)4
c)-1/2
d)-4
e)0

4)if line y-x-1+a=0 is equally inclined to axes and equidistant from points(1,-2) and (3,4) then a is?
a) 2
b)4
c)-1/2
d)-4
e)0