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- #1
You've got a good start.help me out... Im trying to solve for n
p=x*(1-(1+r)^n)/r
so far I know p*r=x*(1-(1+r)^n)
then (p*r)/x=(1-(1+r)^n)
but then i get lost... help!
thanks!!
You've got a good start.
[tex]p = \frac{x \left ( 1 - (1 + r)^n \right )}{r}[/tex]
[tex]pr = x \left ( 1 - (1 + r)^n \right )[/tex]
[tex]\frac{pr}{x} = 1 - (1 + r)^n[/tex]
Now isolate the term with the n in it.
[tex]\frac{pr}{x} - 1 = - (1 + r)^n[/tex]
[tex]1 -\frac{pr}{x} = (1 + r)^n[/tex]
What comes next?
-Dan
Edit: Agh. MarkFL beat me to it. But my work is prettier....(flower)