Mathswatchsimplify (4ab^2)^3

Which equation represents the partial sum of the geometric series?

What is the 12th term of b(n)=-4-2(n-1)

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?