Question

[tex]f,g e R [x] , f= x^{3} + x^{2} -2x + 1 si g= x^{2} + x -2

a) sa se demonstreze ca f-1 = x ori g[/tex]

Answer 1

$f-1= (x^{3}+ x^{2} -2x+1) -1= x^{3}+ x^{2} -2x=x( x^{2} +x-2)=x*g.$