The focus of the parabola (y - 2)2 = 20(x + 3) is
The eccentricity 'e' of a parabola is
<1
>1
= 1
0
If (at2, -2at) are the co-ordinates of one end of a focal chord of the parabola y2 = 4ax, then the co-ordinates of the other end are
(at2, -2at)
(-at2, -2at)
(a/t2, 2a/t)
(a/t2 , -2a/t)
If the line 3x - 4y + 5 = 0 is a tangent to the parabola y2 = 4ax, then a is equal to
15/16
5/4
-4/3
-5/4
The tangents at the points (at12 , 2at1), (at22, 2at2) on the parabola y2 = 4ax are at right angles if
t1t2 = -1
t1t2 = 1
t1t2 = 2
t1t2 = -2
The equation of the directrix of the parabola x2 = -4ay is.
x + a = 0
x - a = 0
y + a = 0
y - a = 0
The equation of the parabola with directrix x = 2 and the axis y = 0 is.
y2 = 8x
y2 = -8x
y2 = 4 x
y2 = -4 x
The vertex of the parabola y2 = 4 ( x + 1) is
(0 , 1)
(0 , -1)
(1, 0)
(-1, 0)
The latus rectum of the parabola x2 - 4x - 2y - 8 = 0 is.
8
4
2
1
The line y = 2 x + c is a tangent to the parabola y2 = 16 x if c equals
-2
-1