MCQOPTIONS
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MCQOPTIONS
| 1. |
The circles whose equations are x2 + y2 + c2 = 2ax and x2 + y2 + c2 = 2by, will touch one another externally if: |
| A. | \(\rm \frac{1}{b^2}+ \frac{1}{c^2}=\frac{1}{a^2}\) |
| B. | \(\rm \frac{1}{c^2}+\frac{1}{a^2}=\frac{1}{b^2}\) |
| C. | \(\rm \frac{1}{a^2}+\frac{1}{b^2}=\frac{1}{c^2}\) |
| D. | None of these. |
| Answer» D. None of these. | |