You need to find the common difference,\(~d\). If the given sequence is \(a_1,~a_2,~a_3\)Q1. Find the 18th term of this arithmetic sequence 15, 11, 7,
Q2. Find the 30th term of this arithmetic sequence 1/2, 1, 3/2, ...
pka gave you the formula for an which is the nth term. To use it, you need the first term which is a1 in the formula and the change from one term to the next which is d.Q1. Find the 18th term of this arithmetic sequence 15, 11, 7,
Q2. Find the 30th term of this arithmetic sequence 1/2, 1, 3/2, ...