(a) Find the binomial expansion of (1-8x), 1x < in ascending powers of x up to and including the term in x, simplifying each term. (b) Show that, when x = 1 100' (c) Substitute x = the exact value of (1-8x) is 23 1 100 approximation to 23. Give your answer to 5 decimal places. into the binomial expansion in part (a) and hence obtain an