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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

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

Step-by-step 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