Ononot — If a1=5 and an = 5(2)^{n-1}, what is the sum of the first 4

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

Geometric Sequencesmedium

0:00.0

If $a_1=5$ and $a_n = 5(2)^{n-1}$ , what is the sum of the first $4$ terms?