Question: Find the indicated quantities.
A series of deposits, each of value and made at equal time intervals, earns an interest rate of I for the time interval. The deposits have a total value of
A(1 + i) + A(1 + i)2 + A(1 + i)3 + . . . . . + A(1 + i)n
After n time intervals (just before the next deposit). Find a formula for this sum.