Ononot — Given an is a geometric sequence where Sn is the sum of the

Guest Session: 1 Question Remaining. Create Account to save progress.

Geometric Sequenceshard

0:00.0

Given $a_n$ is a geometric sequence where $S_n$ is the sum of the first $n$ terms. If $S_3 = 21$ and $S_6 = 189$ , what is $S_9$ ?