Question

Construct examples
a. show that if f and g are one to one, then f+g might not be one to one.
b. show that if f and g are onto, then f+g need not be onto.
c. give an example of functions f and g that are one to one and onto, but f times g is not one to one and not onto.

Answer 1

Do you know what one to one and onto are?

Answer 2

no @geerky42