jitender lakhanpal
Last Activity: 13 Years ago
Dear Menka,
in order to prove that gof:X→Z is onto we have to show that every element in Z
has it's pre image in X i.e
if C be an arbitrary element of Z,B be an arbitrary element of Y, A be an arbitrary element of Z.
for all C belongs to Z there exists A belongs X such that (gof)(A)=C ------------to prove
as f:X→Y is onto that means f (A) = B-------------------1
g:Y→Z is onto that means g (B) = C ----------------------2
|
|
gof(A) = g(f(A))=g(B) = C
|
hence proved |
We are all IITians and here to help you in your IIT JEE preparation.
Now you can win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar : Click here to download the toolbar..
jitender
askiitians expert