Find a formula for the inverse of the function.
f(n)=4en3.
f^[−1](Q)=
Is that
f(n) = 4e^(n^3) ?
n^3 = ln(f/4)
n = ∛ln(f/4)
so, f^-1(Q) = ∛ln(Q/4)
That is kind of strange, so maybe you can fix it and follow the same logic to find the inverse you want.
If you get stuck, show some work...