Question

How do I restrict the domain and codomain of f(x) = x^2 so that it is a bijection (and its inverse is a function)?

Answer 1

isnt bijection just another term for inverse function? one-to-one?

Answer 2

just say that x>=0
then for every value of x there is only one y
and it is a strictly increasing function so for every y there is only 1 x

Answer 3

bijection means that function is onto and one to one

Answer 4

thought so; it sounded like group theory terminology to me..

Answer 5

I learnt this at Calculus

Answer 6

Rio another solution is 0>=x