Lembit wrote:
I need help!!!
What should i do if i want to get out r from this function where i
already have a and b.
(1-(1/(1+r))^b)/r=a is there any logarithm and if there is in what
library do i find it
I'm too lazy to attempt the algebra at the moment, but looking at it, I'd
say no, there is no formula for that value - you'll have to use numerical
methods to search for a suitable r for a given a and b. For example, you
might use "Newton's Method" to solve this. You'll likely have to look it up
in a numerical methods book or a calculus book.
-cd