Question

Let a1, a2, a3,..., an.... be a geometric séquence. Find a4.a1 = 2, r= 3=(Simplify your answer.)

Answer 1

Answer:

The fourth term is:

$a_4=a_1r^3$

Explanation:

Given that the first term is a1 and the common ratio is r = 3

The nth term of a geometric sequence is:

$T_n=a_1r^{n-1}$

Using n = 3, we have

$T_4=a_1r^3$