# Prove that the copying f:R->[1,+∞), f(x)=x²+1 is surjection but not injection?

Prove that the copying f:R->[1,+∞), f(x)=x²+1 is surjection but not injection.

How T_T, I got exam in 3 hours lol

How T_T, I got exam in 3 hours lol

Follow

2 answers
2

Are you sure that you want to delete this answer?