The equation of line which is perpendicular to x + y + 1 = 0 and passes through (1,2) is.
y - x + 1 = 0
y - x - 1 = 0
y - x + 2 = 0
y - x - 2 = 0
The gradient of line which cuts equal intercepts with coordinate axis is.
-1
0
2
√3
If lines 3y + 4x = 1 , y = x + 5 and 5y + bx = 3 are concurrent,then the value of b is.
1
3
6
If lines ax - 5y = 5 and 2x + y = 1 are perpendicular then the value of a is
5/2
2/5
1/2
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
The distance between lines 3x + 4y = 9 and 6x + 8y = 15 is.
3/2
3/10
2/3
The slope of a line parallel to a line whose slope is-3
-3
-3/2
The base of equilateral traingle is x + y = 2 and its vertex is (2,-1) , the length of side of traingle is.
√2
√3/2
√(2/3)
The line 5x - 2y + 4k = 0 is a tangent to 4x2 - y2 = 36, then k is
4/9
9/4
81/16
If lines 3x - y =2,5x + ay = 3 and 2x + y = 3 are concurrent ,then a =
-2
