The locus of a point which moves so that the difference of the squares of its distances from two given points is constant, is a
A. Straight line
B. Plane
C. Sphere
D. None of these
Answer:B
The locus of a point which moves so that the difference of the squares of its distances from two given points is constant, is a
A. Straight line B. Plane C. Sphere D. None of these