conic-section

Question: The equation of an ellipse whose focus (–1, 1), whose directrix is $x-y+3=0$ and whose eccentricity is $\frac{1}{2}$ , is given by



1) $7{{x}^{2}}+2xy+7{{y}^{2}}+10x-10y+7=0$
2) $7{{x}^{2}}-2xy+7{{y}^{2}}-10x+10y+7=0$
3) $7{{x}^{2}}-2xy+7{{y}^{2}}-10x-10y-7=0$
4) $7{{x}^{2}}-2xy+7{{y}^{2}}+10x+10y-7=0$
Solution: Explanation: No Explanation
Ellipse

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