Question 1179550: Prove that if f : A → B is a function from A to B, then f ◦ iA = f and iB ◦ f = f.
(iA: inverse of A).
Answer by ikleyn(52778)   (Show Source):
You can put this solution on YOUR website! .
Prove that if f : A → B is a function from A to B, then f ◦ iA = f and iB ◦ f = f.
(iA: inverse of A).
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This statement (in BOTH its parts) is INCORRECT.
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Comment from student : If you think is "incorrect", please don't respond let someone else try to help. Thank you.
My response. If I do not respond, you will NEVER know that your post is incorrect.
THEREFORE, all that you should/need to respond is to say "THANK YOU" to me for pointing errors in your post.
After that write the dot " . " ; then STOP at this point and do not write nothing else.
Do not try to teach me how to react to your posts.
Do not try to express your sujjestions about my teaching, because you do not know and do not understand the subject.
It would be much better, if you ask your questions instead of posting your comments about my teaching.
Have a nice day (!)
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Your comment that you posted to me, reminds me a driver on a highway lane, who, instead of going forward,
turns on the reverse transmission and moves his car backward in this lane, while and where all other drivers still continue move forward.
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