C3 differentiation past-papers: mark schemes

—€(5x-1)) { ((5x-1)Y) Accept awrt 15.3 Ml Al Ml Alft Ml Ml (5x-1) dy Atx=2, 12+— d sin 2x x 2x2 cos2x— 2xsin 2x (ii) dx2 ( 1,- x (sin X +2COSX)) — 3e3x (sin X+ 2COSX)+ (COSX— e x (sinx+7cosx 5X+2 dy (x (6x+ 6) — 2 (x + 1) (3xŽ +6x —7) (x + l) (6x2 + 12x+ 6— 6x2 — +14) 2 sin x) CSO both Ml Al Al (3) Ml Al Al (3) Ml Ml Al Ml Ml ................
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