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The normal drawn at a point (a t1 2,-2a ...

The normal drawn at a point `(a t1 2,-2a t_1)` of the parabola `y^2=4a x` meets it again in the point `(a t2 2,2a t_2),` then `t_2=t_1+2/(t_1)` (b) `t_2=t_1-2/(t_1)` `t_2=-t_1+2/(t_1)` (d) `t_2=-t_1-2/(t_1)`

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