Hey,
Just another questiopn on parameters:
P(2at,at^2) is a variable point on the parabola x^2 = 4ay, whose focus is S. Q (x,y) divides the interval from P to S in the ratio t^2:1
(i) Find x and y in terms of a and t. (i got Q(2at/t^2+1,2at^2/t^2+1))
(ii) Verify that y/x = t
(iii) Prove that...