Question

If the chord of contact of tangents from a point $P (x_1, y_1)$ to the circle $x^2 + y^2 = a^2$ touches the circle $x^2 + y^2 = r^2$, then the locus of $(x_1,y_1)$ is

• A. a circle
• B. a st. line
• C. an ellipse
• D. none of these.

Answer 1

Answer: (D)

none of these.

Answer 2

Answer (d) none of these.