If the line y=mx+c touches the parabola ...

If the line y=mx+c touches the parabola `y^(2)=4a(x+a)`, then

A

`c= a (m+(1)/(4))`

B

`c=a (m-(1)/(m))`

C

`c = (a)/(m)`

D

`a=(m-(1)/(m))`

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The correct Answer is:

A

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