conic-section

Question: The line $y=2x+c$ is tangent to the parabola ${{y}^{2}}=4x$ , then $c=$



1) $-\frac{1}{2}$
2) $\frac{1}{2}$
3) $\frac{1}{3}$
4) 4
Solution: Explanation: No Explanation
Parabola

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