Hello friends, given a present value of a uniform, how to determine the annual fee payments if, say, within three years, the interest the first year is 3%, the second year of 8% and third 5%?

Of course, I have to pay an annuity is like:

Uniform set value given a present value:

A= P \left[\displaystyle\frac{i(1 + i)^n}{(1 + i)^n - 1} \right]

But I do not find what to do with the different interest rates for each of the three years.

Thank you very much. This is not what I could find on the internet or in books I have on hand.

Greetings.

PD: Latex show error...