SOLUTION: Could you rearange this formula to solve I and also rearange it to solve N I can't find it out. FV = PV * ( 1 + I ) ^ N where FV =future value PV =present value I =inter

Question 989720: Could you rearange this formula to solve I and also rearange it to solve N
I can't find it out.
FV = PV * ( 1 + I ) ^ N
where
FV =future value
PV =present value
I =interest rate
N =periods
Thank you very much
Alain
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
FV = PV * ( 1 + I ) ^ N
1) solve for I
divide both sides of = by PV
( 1 + I ) ^ N = FV / PV
take the Nth root of both sides of =
1 + I = ( FV / PV ) ^ (1 / N )
subtract 1 from both sides of =
I = ( ( FV / PV ) ^ (1 / N ) ) - 1
2) solve for N
divide both sides of = by PV
use definition of logarithm - log base a of X = N means a ^ N = X
N = log base (I + 1) of ( FV / PV )

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