Question 4 8 a In the expansion of ( + kx ) , the coefficient of the x2 term is 63 256 Find the values of k. b) A geometric series is defined as It, VI, ... i) Write down the 19th term in terms of It. ii) Does this series converge? Give a reason. c) The 2nd and 3'd terms of an arithmetic series are 10x and 13x respectively. The sum of the first 40 terms is 655. Find the value of x