Hi
Cant figure this one out. any help GREATLY appreciated...
a) Write down the first 4 terms of the binomial expansion, in ascending powers of x, of (1+ax)^n, n >2.
b) Given that, in this expansion, the coefficient of x is 8 and the coefficient of x^2 is 30,
calculate the value of n and a.
c) Find the coefficient of x^3