222
(gof)(2)=(fog)(2)(\mathrm{gof})(2)=(\mathrm{fog})(2)(gof)(2)=(fog)(2)
−1-1−1
(fog)(2)≠( gof )(2)(f o g)(2) \neq(\text { gof })(2)(fog)(2)=( gof )(2)
Answer : A & D