conic-section

Question: In an ellipse $9{{x}^{2}}+5{{y}^{2}}=45$ , the distance between the foci is



1) $4\sqrt{5}$
2) $\frac{49}{4}{{x}^{2}}-\frac{51}{196}{{y}^{2}}=1$
3) 3
4) 4
Solution: Explanation: No Explanation
Ellipse

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