Cambridge International Examinations
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9709 m18 qp 12
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3
2 (i) Find the coefficients of x 2 and x 3 in the expansion of 1 − 2 x 7 . [3] ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ (ii) Hence find the coefficient of x 3 in the expansion of 2 + 5 x 1 − 2 x 7 . [2] ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ © UCLES 2018 9709/12/F/M/18 Download 134.67 Kb. Do'stlaringiz bilan baham: 
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