Question

If the first term of a sequence is 5 and the common ratio is 3, what is the 4th term of the sequence?


Select an answer

A.
135


B.
27


C.
45


D.
81

Answer 1

This is a geometric sequence with nth term a_n = a1 * r^(n-1).
a_4 = 5 * 3^(4-1) = 5 * 27 = 135.

Answer: A. 135