conic-section

Question: If the line $y=2x+c$ be a tangent to the ellipse $\frac{{{x}^{2}}}{8}+\frac{{{y}^{2}}}{4}=1$ , then $c=$



1) $\pm 4$
2) $\pm 6$
3) $\pm 1$
4) $\pm 8$
Solution: Explanation: No Explanation
Ellipse

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