Question

PLEASE HELP

Identify the 15th term of the arithmetic sequence in which a. = 10 and ao = 20.

Answer 1

The 15th term is 160

Explanation:

The details are not clear. So, I will make the following assumptions

`d = 10` ---- common difference

`a_1 = 20` ---- first term

Required

The 15th term

This is calculated as:

`a_(n) = a + (n - 1) * d`

Substitute 15 for n

`a_(15) = a + (15 - 1) * d`

`a_(15) = a + 14 * d`

Substitute values for d and a

`a_(15) = 20 + 14 * 10`

`a_(15) = 20 + 140`

`a_(15) = 160`