How much will be accumulated in a fund, earning 6% yearly interest, at the end of 4 years if 700$ is deposited at the beginning of each year for the 4 years?

our prof is suggesting we use the equasion F(future)= A*(((1+i)^n-1)-1) / i

where A =750 and i = .06 and n(compound period)=4 however looking at this equasion if n=1 then the equasion is now F=A and if you have $750 in the bank for a year you earn the interest on it, so this equasion seems wrong to me, every answer you get needs to be multiplied by an extra (1+i) if you are counting n as compound periods or years having intrest collected on the money. am i right???!