Question

A function is called into if:

Options

• At least one element of the codomain is not the image of any element of the domain

• Every element of the codomain has a pre-image

• Different elements of the domain have different images

• It is both one-one and onto

Answer 1

For an into function, at least one codomain element is not reached by the function. Thus, the range is a proper subset of the codomain, written as \[\text{Range}\subset\text{Codomain}\].