If P (a,b) lies on 3x + 2y = 13 and point Q (b,a) lies on ax - y = 5 then the equation of PQ is
x - y = 5
x + y = 5
x + y = -5
x - y = -5
If lines x + 2ay + a = 0, x + 3by + b = 0 and x + 4cy + c = 0 are concurrent,then a,b,c, are in
A.P
G.P
H.P
None of these
If lines 3y + 4x = 1 , y = x + 5 and 5y + bx = 3 are concurrent,then the value of b is.
1
3
6
0
If P is the length of perpendicular from origin to the line which intercepts a and b on axes , then.
a2 + b2 = p2
a2 + b2 = 1/p2
1/a2 + 1/b2 = 2/p2
1/a2 + 1/b2 = 1/p2
The gradient of line which cuts equal intercepts with coordinate axis is.
-1
2
√3
The slope of the line which is perpendicular to the line joining the point (0, 0) and (-1, 1) is
1/2
-2
If lines ax - 5y = 5 and 2x + y = 1 are perpendicular then the value of a is
5/2
2/5
If lines 3x - y =2,5x + ay = 3 and 2x + y = 3 are concurrent ,then a =
The equation of line which passes through (1,-2) and cuts equal intercepts with coordinate axis is.
x + y = 1
x - y = 1
x + y + 1 = 0
x - y - 2 = 0
The equation of lines passing through (3,2) and perpendicular to y = x is.
x - y =1