The radius of the sphere x2 + y2 + z2 = 12x + 4y + 3z is
13/2
13
26
52
A.
13/2
Given equation of sphere is
x2 + y2 + z2 = 12x + 4y + 3z = 0
Let A and B are two fixed points in a plane, then locus of another point Con the same plane such that CA + CB = constant, (> AB) is
circle
ellipse
parabola
hyperbola
If the normal at (ap, 2ap) on the parabola y2 = 4ax, meets the parabola again at (aq2 , 2aq), then
p2 + pq + 2 = 0
p2 - pq + 2 = 0
q2 + pq + 2 = 0
p2 + pq + 1
The curve described parametrically by x = t2 + 2t - 1, y = 3t + 5 represents :
an ellipse
a hyperbola
a parabola
a circle