[8] 12 5. Working parametrically: (a) Applies to obtain a for M1 t. A1 When , Correct for y. [2] Applies to obtain a value for t. (b) M1 (Must be seen in part (b)). A1 When , [2] (c) and either or B1 Attempts divided by M1 their At so Applies and M1 A, or or equivalent. M1 A1 oe cso [5] Complete substitution for both (d) M1 and B1 Either or M1* or A1
[8] 12 5. Working parametrically: (a) Applies to obtain a for t. M1 When , Correct for y. A1 [2] (b) Applies to obtain a value for t. (Must be seen in part (b)). M1 When , A1 [2] (c) and either or B1 Attempts divided by their M1 At A, so Applies and M1 or or equivalent. M1 A1 oe cso [5] (d) Complete substitution for both and M1 B1 Either or or M1* A1
c4_2014-2010markschemes.docx