Răspuns :
notezi f ^(-1 ) inversa functiei f
f^(-1 ):(0,∞)→(1 ,∞)
f(x)=log_2 x³
f(x)=y
y=log_2 x³=>2^y=x³+> x=∛2^y faci transformarea y→x
y^(-1)=f^(-1)(x)=∛2^x
f^(-1 ):(0,∞)→(1 ,∞)
f(x)=log_2 x³
f(x)=y
y=log_2 x³=>2^y=x³+> x=∛2^y faci transformarea y→x
y^(-1)=f^(-1)(x)=∛2^x
Sau putem scrie : [tex] f^{-1}:(0: \infty} )-\ \textgreater \ (1;\infty) [/tex][tex],si,f^{-1}(x)= \sqrt[3]{2^x} [/tex]