conic-section

Question: The condition for which the straight line $y=mx+c$ touches the parabola ${{y}^{2}}=4ax$ is



1) $a=c$
2) $\frac{a}{c}=m$
3) $m={{a}^{2}}c$
4) $m=a{{c}^{2}}$
Solution: Explanation: No Explanation
Parabola

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