Question 940031
f(x)=|x+1|; g(x)= 2x + 3
fog  = f(g(x))
   =f(2x+3)
    replace x with 2x+3 in f(x)
   = |2x+3+1|
  =|2x+4|
 fog  =|2x+4|
 Domain:
for values of x, the above said function is valid
hence domain  is all real numbers  (R)
gof  = g(f(x))
      = g(|x+1|)
 replace x with |x+1| in g(x)
 =2|x+1| +3
domain:for values of x, the above said function is valid
hence domain  is all real numbers  (R)