conic-section

Question: The equation $\frac{{{x}^{2}}}{2-r}+\frac{{{y}^{2}}}{r-5}+1=0$ represents an ellipse, if



1) $r>2$
2) $2<r<5$
3) $r>5$
4) None of these
Solution: Explanation: No Explanation
Ellipse

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