Question

Given are the first three terms of a sequence that is either arithmetic or geometric. If the sequence is​ arithmetic, find and d. If a sequence is​ geometric, find and r. 7​,9,11

Answer 1

Answer: The common difference, d of the arithmetic progression is 2

Explanation:

In the sequence 7, 9, 11, we can see that an additional term is gotten upon the addition of 2, so it is an arithmetic progression.

given that that first term a , =7

and the second term a + d = 9

The common difference , d =(a + d) − a

d = 9 − 7

d= 2