You could use your photo if you want to. :)
I assume that is you? You are a pretty girl
x=-y/3+1
x-1=-y/3
3x-3=-y
y=-3x+3
this is the inverse function :)
Are you sure it is correct?
It looks like some financial formula but it does not look right.
Is it a part of a bigger problem?
It looks like it will be horrible to solve as it is now.
An excellent answer - thank you. :)
$$\frac{1.90(1.20)}{(1 + R)} + \frac{1.90(1.20)(1.15) }{ (1 + R)^2} + \frac{1.90(1.20)(1.15)(1.10)}{(1 + R)^3} +\frac{ \frac{1.90(1.20)(1.15)(1.10)(1.05) }{ (R-0.05) }}{(1 + R)^3 }= $34.02$$
I am not answering right now but is this your intended question?
(I believe it is what you have asked)
Thanks Alan - I didn't know that 'by definition' bit.
Actually you haven't used L'hopitals rule though ?
So do I
What a clever baba :)
15*15=225
that is the number of tiles
+118733 
