What is f(3)? in the 1st term of arithmetic sequence is 5 and the common difference is 1.5

Mathematics · Middle School · Tue Nov 03 2020

Answered on

Given:

a1 = 5

d =1.5

Determine f(3)

Formula for arithmetic sequence:

An = a1 + (n - 1)d

Solution:

Substitute the given values of a1 and d to the formula for arithmetic sequence.

A3 = 5 + (3 - 1) 1.5

A3  = 5 + (2)(1.5)

A3 = 5 + 3

A3 = 8

Final answer:

A3 = 8