10 Question Scheme Notes Marks Number 8. with general point (a) Using to find M1 a. A1 oe So, directrix has the equation (2) (b) or (implicitly) M1 their or (chain rule) When A1 or Applies or using in an T: attempt to find c. Their M1 mT must be a function of . t T: A1 cso* T: Correct solution. (4) (c) Compare with gives B1 NB with = 3 and = 12 gives x y into T gives Substitutes their into T. M1 t Substitutes their from (a) into x At M1 X, T. So, A1 So the coordinates of are X (4) 10 Question Scheme Notes Marks Number 9. (a) Check to see that B1 the result is true As the matrix result is true for
10 Question Number Scheme Notes Marks 8. with general point (a) Using to find a. M1 So, directrix has the equation A1 oe (2) (b) or (implicitly) or (chain rule) their M1 When or A1 T: Applies or using in an attempt to find c. Their mT must be a function of t . M1 T: T: Correct solution. A1 cso* (4) (c) Compare with gives B1 NB with x = 3 and y = 12 gives into T gives Substitutes their t into T. M1 At X, Substitutes their x from (a) into T. M1 So, So the coordinates of X are A1 (4) 10 Question Number Scheme Notes Marks 9. (a) Check to see that the result is true B1 As the matrix result is true for
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