Arhh yes! Good point.

You could solve it graphically like this;

using

http://www.mathsisfun.com/data/function … 8&ymax=1.2

I've chosen r = 0.05 and you have to have x instead of n.

You can put y = FV/PV as the second graph and zoom in on the point where the line cuts the curve.

Bob

]]>You can not always solve for any variable you want. In this case I do not think you can get n by itself on the left.

]]>I'm assuming you mean 'if I know all the variables except n, how do I work it out?'

http://www.mathsisfun.com/money/compoun … l#periodic

Half way down the page is the formula for this.

Bob

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