What are the values of a 1 and r of the geometric series? 1 + 3 + 9 + 27 + 81

Question

Mathematics

Edith Mercer

27 February, 13:13

What are the values of a 1 and r of the geometric series? 1 + 3 + 9 + 27 + 81

+4

Answers (2)

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Amaris Livingston · Answer 1

a₁ = 1; r = 3

Step-by-step explanation:

a₁ represents the first term. It is 1 in this case.

r represents the common ratio between terms. In this case it's 3 / 1 = 3.

Ana Coleman · Answer 2

a1 = 1

r = 3

Step-by-step explanation:

a1 = first term = 1

r = common ratio = 2nd term/1st term

= 3/1

r = 3