Question

a ) Daca f : R -> R , f(x) = -3x + 7sa se determine o functie g: R -> R astfel incat (f(g(x)) = 1 R (x) , g(f(x)) = 1R (x)
B ) Analog pt functiile f1 : R - > R , f z (x) = 7x - 3 , f2 : R -> R , f2 (x) = 1/3 x - 5 : f3 : R , f3 (x) = 2x + 1/5 . f4 : R -> R , f4(x) = -3/2 x - 6.

Answer 1

Ştii ce înseamnă $1_{\mathbb{R}}(x)$?