Question

Functia inversa la f(x)=x^3+2x

Answer 1

X^3+2x=y=> x(x^2+2)=y=> x=y sau x=radical din y-2

Answer 2

Functia inversa este $f^{-1}$

Notam f(x) cu y ⇒ f(x) = y ⇒ $x^{3} + 2x = y$ ⇒ x( x² + 2) = y ⇒ x=y