Question

A function is called one-one if different elements of the domain have:

Options

• At least two images in the codomain

• Different images in the codomain

• The same image in the codomain

• No image in the codomain

Answer 1

In a one-one function, different elements of the domain have different images in the codomain. Its defining condition is \[f(x_1)=f(x_2)\Rightarrow x_1=x_2\].