Question

if f(x)=f (f (x ))=x+7andg (x)=x-7,x €T.find the following. 1.fof (7); 2.fog (7); 3.gof (7); 4.gog (7);

Answer 1

Answer:1)14or 21

2)7

3)7

4)-7

Step-by-step explanation:

1) f(f(7))=7+7=14

Or

f(f(7))=f(7+7)=f(14)=21

2)f(g(7))=f(0)=7

3)g(f(7))=g(14)=7

4)g(g(7))=g(0)=-7