0606/21/M/J/16 Q8


8 (a) (i) Use the Binomial Theorem to expand (a + b)^4 , giving each term in its simplest form. [2]

(ii) Hence find the term independent of x in the expansion of (2x + 1/5x)^4. [2]

(b) The coefficient of x^3 in the expansion of (1 + x/2)^n  equals 5n/12. Find the value of the positive integer n.

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