The radius of the circle x2 + y2 - 2 x + 4 y - 4 = 0 is
1
2
3
4
The y- intercept of the straight line 3 x + 2 y -1 = 0 is
1/2
-1/2
If 2 x2 + 3 y x - c y2 = 0 represent a pair of perpendicular lines then c =
-2
The equation of x- axis is
x = 0
x = 0, y= 0
y = 0
x = 4
The equation of the straight line containing the point (-2,1) and parallel to 4 x - 2 y = 3 is
y = 2 x + 5
y = 2 x - 1
y = x - 2
y = 1/2 x
Equation of two parallel straight lines differ by
x term
y term
constant term
xy term
When h2 = a b the angle between pair of straight lines a x2 + 2 h x y + 2 h x y + b y2 = 0 is.
π/4
π/6
π/2
0o
The three straight lines a x +b y = c, b x + c y = a and c x + a y = b are collinear, if
b + c = a
c + a = b
a + b + c = 0
a + b = c
If a line with Y - intercept 2, is perpendicular to the line 3 x - 2 y = 6, then its x - intercept is
-4
The length of the diameter of a circle with centre (2,1) and passing through the point (-2,1) is
8
4√5
