conic-section

Question: The equation of the director circle of the hyperbola $\frac{{{x}^{2}}}{16}-\frac{{{y}^{2}}}{4}=1$ is given by



1) ${{x}^{2}}+{{y}^{2}}=16$
2) ${{x}^{2}}+{{y}^{2}}=4$
3) ${{x}^{2}}+{{y}^{2}}=20$
4) ${{x}^{2}}+{{y}^{2}}=12$
Solution: Explanation: No Explanation
Hyperbola

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