- #1
a150daysflood
- 23
- 0
Functions f and g are defined as follows:
f:x -->ln(2+x) , x> -2
g:x-->1/(x+3)+2 , x<-3
(ii)Explain why the composite function fg cannot be properly defined unless the domain of g is restricted to a subset of {where x is real,x < -3}.State the largest possible subset for fg to exist and find the corresponding range.
My problem:
Domain of f is x>-2,
Range of g is (2,-infinity].
So g is not a subset of f,then why did the question says that it can be properly defined if it is restricted to {where x is real,x < -3}?
Please enlighten me thank you.
f:x -->ln(2+x) , x> -2
g:x-->1/(x+3)+2 , x<-3
(ii)Explain why the composite function fg cannot be properly defined unless the domain of g is restricted to a subset of {where x is real,x < -3}.State the largest possible subset for fg to exist and find the corresponding range.
My problem:
Domain of f is x>-2,
Range of g is (2,-infinity].
So g is not a subset of f,then why did the question says that it can be properly defined if it is restricted to {where x is real,x < -3}?
Please enlighten me thank you.