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Prove that y=mx+c touches the parabola ...

Prove that `y=mx+c` touches the parabola `y^2 `= `4ax` if `a=mc`.

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MODERN PUBLICATION-APPLICATIONS OF DERIVATIVES-PROBLEM
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  4. Find the equation of normal to the curve x^3 =4y which passes through ...

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  5. Prove that y=mx+c touches the parabola y^2 = 4ax if a=mc.

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  12. Show that y=mx+c is a tangent to the ellipse x^2/a^2+y^2/b^2=1 if c^2=...

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