Solve this:

​Q103. If a tangent to the parabola y2 = 4ax meet the X-axis in T and tangent at the vertex A in P and the rectangle TAPQ completed. The locus of Q is 

          a) y2 + ax = 0                                              b) y2 – ax = 0

          c) x2 + ay = 0                                              d) x2 – ay = 0
 

Tha ans should be A. Mind my handwriting. Tangent to a standard parabola is y=mx+(a/m) Let Q be (h, k)....write T and P in terms of h and k with the help of the diagram. Plug in those coordinates in the equation of tangent. Eliminate m from the two eauations that u get...done!

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