Question

f:{-2; 0; 2; 5}> B, fx) = 2x -1;​

Answer 1

presupun ca trebuie sa afli codomeniul B

daca f(x)=2x-1=> f(-2)=2(-2) -1= -4-1= -5

=> f(0)=2 • 0 -1= -1

=> f(2)=2•2-1= 3

=> f(5)=2•5-1= 9

=> B= {-5, -1, 3, 9}