Lucy has determined a function f(x) that shows the exponential growth of the number of t-shirts Oliver owns each year. Explain how the f−1(x) can be found and what f−1(300) means.

Question

anonymous · Answer

you mean $f^{-1}$?

anonymous · Answer

Yes @zimmah

anonymous · Answer

alright, since $f^{-1}(x)$ is the inverse of f(x) it would be nice to know the f(x), is that given?

anonymous · Answer

No it's not :/ they just want me to explain it

anonymous · Answer

well the first one of the question will be a little hard to do without an f(x), but $f^{-1}(300)$ is the equation that finds the number of years it will take before Lucy has collected 300 shirts.

anonymous · Answer

@zimmah you are a lifesaver thank youu!

anonymous · Answer

maybe this may help you understand inverse functions a little better: http://www.mathsisfun.com/sets/function-inverse.html