Math CentralQuandaries & Queries


Question from Brandi, a student:

Objective: solve for t, where r = 0.05

0 = (1/t) - [ln(1+r) ln(t)]

Thanks, I am stumped....

Hi Brandi,

Let a = ln(1 + 0.05) which is approximately 0.4879 and your equation becomes

(1/t) - a ln(t) = 0

There is no simple way to solve this equation for t, the best I can do is offer an approximation. I would try the Newton-Raphson method on this problem.

I hope this helps,

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