Question

Find the formula for the nth term of the arithmetic sequence whose first term and a common difference are given: a=1, d=5

Answer 1

nth=3n+1. (B) nth=5n−13. Explanation: the nth term of an Ap is given by. nth=a+(n−1)d. (A). nth=4+(n−1)3. nth=4+3n−3.

Answer 2

Explanation:

The formula for the nth term of an arithmetic sequence is:

a_n = a + (n - 1)d

where a is the first term, d is the common difference, and n is the term number.

Substituting a=1 and d=5, we get:

a_n = 1 + (n - 1)5

Simplifying this expression, we get:

a_n = 5n - 4

Therefore, the formula for the nth term of the arithmetic sequence with first term a=1 and common difference d=5 is a_n = 5n - 4.