Shreyansh Gandhi
Last Activity: 14 Years ago
We know the slope of the normal which is (-1). This implies that the slope of the tangent is 1. Now,
y= mx+c is a tangent to y^2=4ax, iff. c=a/m.
Putting a=3, m=1, we get c=3.
Tangent is y=x+3.
Solving the equations of parabola and tangent, we get pts (3,6) and(3,-6)
This means that k=-3 or k=9