Question

f(x)=2^3x+5 finding f^-1 (x) ?

Answer 1

Is that \(f(x)=2^{3x}+5\)?

Answer 2

correcto

Answer 3

\(y=2^{3x}+5\)
\(y-5=2^{3x}\)
\(\log_2(y-5)=3x\)
\(x=\frac{1}{3}\log_2(y-5)\)
So
\(f^{-1}(x)=\frac{1}{3}\log_2(x-5)\)

Answer 4

wow! thanx