1. Find the first term and the common difference of the arithmetic sequence described. Give a recursive formula for the sequence. Find a formula for the nth term. 7th term is 18; 20th term is 70 What is the first term of the sequence? What is the common difference? What is the recursive formula for the sequence? a1= an=an-1+... What is the formula for the nth term of the sequence? an= 2. Find the fifth term and the nth term of the geometric sequence whose initial term a, and common ratio r are given. a, = 5, = 2 The fifth term of the geometric sequence is a5= (Simplify your answer.) The nth term of the geometric sequence is an=