Isomorphism of sets

[ludwig259]

Hii, i'm just wondering if these two inverse functions are constructed correctly. Any feedback would be appreciated .

 

[pka]

Hii, i'm just wondering if these two inverse functions are constructed correctly. Any feedback would be appreciated .
View attachment 30942

Please post the actual wording of the question. From what you have posted it appears that the question is using a highly irregular form of notation. If I were to guess now it would be that [imath]A\times(B\cup C)=(A\times B)\cup(A\times C)[/imath]
Please post the actual wording of the question.

[imath][/imath][imath][/imath]