If the straight lines a1 x+b1 y + c1 = 0 and a2 x + b2 y + c2 = 0 are perpendicular, then
a1a2 = -b1b2
The y- intercept of the straight line 3 x + 2 y -1 = 0 is
2
3
1/2
-1/2
If 2 x2 +k x y + 4 y2 = 0 represents a pair of parallel lines then k =
± 32
± 2 √2
± 4√2
± 8
The length of the diameter of a circle with centre (2,1) and passing through the point (-2,1) is
4
8
4√5
The equation of x- axis is
x = 0
x = 0, y= 0
y = 0
x = 4
The slope of the straight line 2 x -3 y + 1 = 0 is
-2/3
-3/2
2/3
3/2
The equation 12 x2 + 7 x y + a y2 + 12 x - y + 3 = 0 represents a pair of perpendicular lines. Then, the value of 'a' is.
7/2
-19
-12
12
The radius of the circle x2 + y2 - 2x + 4y - 4 = 0 is
1
Which of the following has the greatest y - intercept in magnitude?
2 x + 3 y = 4
x + 2 y = 3
3 x + 4 y = 5
4 x + 5 y = 6
Which of the following is the equation of a straight line that is neither parallel nor perpendicular to the straight line given by x + y = 0.
y = x
y - x + 2 = 0
2 y = 4 x + 1
y + x + 2 = 0
