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    equation of the noraml to x^2=4ay

    Can someone please help me with these questions ? a) Prove that the line x-2y-2=0 is a tangent to the parabola x^2=16y. b) Given the parabola x^2 = 1/2, for what values of m does the line y= m(x+1): i) have 2 points of intersection ? ii) one point of intersection? iii) no points of...
  2. O

    equation of the chord to parabola

    can someone please help me with this question??? a secant which passes through the point ( 0,-a), cuts the parabola x2 = 4ay at P, Q with parameters p,q If S is the focus show that 1 / PS + 1/ QS= 1/a
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