__Question 2:__The first three terms of an arithmetic progression are 2

*k*, 3

*k*+ 3, 5

*k*+ 1. Find

(a) the value of

*k*,

(b the sum of the first 15 terms of the progression.

**[ Remember if a, b , c are three consecutive term of arithmetic progression, then c – b = b – a ]**

**Solution:**)

good question!!