**??? - 2015 JUNE Q4**

4.

i) Find and simplify the first three terms in the binomial expression of (2 +

ii) In the expansion of (3-5

i) Find and simplify the first three terms in the binomial expression of (2 +

*ax*)^{6}in ascending powers of*x*[4]ii) In the expansion of (3-5

*x*)(2 +*ax*)^{6}, the coefficient of x is 64. Find the value of*a*. [4]