Find the common ratio if geometric sequence has first term 54 and 4th term 2

Joglxym

Joglxym

Answered question

2022-11-08

Find the common ratio if geometric sequence has first term 54 and 4th term 2

Answer & Explanation

Quinten Cervantes

Quinten Cervantes

Beginner2022-11-09Added 13 answers

A n = A 1 r n - 1
A 1 = 54
A 4 = 2 = A 1 r 4 - 1
2 = 54 r 3
2 54 = r 3
1 27 = r 3
( 1 3 ) 3 = r 3
r = 1 3

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