A point moves, so that the sum of squares of its distance from the points (1, 2) and (- 2, 1) is always 6. Then, its locus is
the straight line
a circle with centre and radius
a parabola with focus (1, 2) and directrix passing through (- 2, 1)
an ellipse with foci (1, 2) and (- 2, 1)
A circle passing through (0, 0), (2, 6), (6, 2) cut the x-axis at the point P (0, 0). Then, the lenght of OP, where O is the origin, is
5
10
If one end of a diameter of the circle 3x2 + 3y2 - 9x + 6y + y = 0 is (1, 2), then the other end is
(2, 1)
(2, 4)
(2, - 4)
(- 4, 2)
C.
(2, - 4)
Given equaitson of circle is,
3x2 + 3y2 - 9x + 6y + 5 = 0
We know that, centre of the circle is the mid-point of the diameter.
Lives one and of point of dianetev in (1, 2) Let the other end point of diameter is (h, k)
So, the other end point is (2, - 4).
The line y = x intersects the hyperbola at the points P and Q. The eccentricity of ellipse with PQ as major axis and minor axis of length is
If the distance between the foci of an ellipse is equal to the length of the latusrectum, then its eccentricity is
The equation of the circle passing through the point (1, 1) and the points of intersection of x2 + y2 - 6x - 8 = 0 and x2 + y2 - 6 = 0 is
x2 + y2 + 3x - 5 = 0
x2 + y2 - 4x + 2 = 0
x2 + y2 + 6x - 4 = 0
x2 + y2 - 4y - 2 = 0
The area of the region bounded by the parabola y = x2 - 4x + 5 and the straight line y= x + l is
2
3
If the circles x2 + y2 + 2x + 2ky + 6 = 0 and x2 + y2 + 2ky + k = 0 intersect orthogonally, then k is equal to
If four distinct points (2k, 3k), (2, 0), (0, 3), (0, 0) lie on a circle, then
k < 0
0 < k < 1
k = 1
k > 1