SPM Practice 1 (Arithmetic Progression) :Question 2

Question 2

The first three terms of an arithmetic progression are 2k, 3k+3, 5k+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
Click here to review the concept]