Hi:

Question: Find the composite function gf for the domain 3<=x<=7.

f:x>12/x-1, 3<=x<=7

g:x>x+2, xER

If it were a value, say (2), I understand that I need to input value into f before g, like in a computer. But I can't understand part of question 'for the domain', and can't get the required answer.

Answer: gf:x>2x+10/x-1, 3<=x<=7

thank you.