Question

if it is not injection it is surjection or not????​

Answer 1

Answer:

h:N→ Z  

h(x)=x2+5

(2)

p:[0,∞)→ [5,∞)

p(x)=x2+5

I think (1) is injective but not surjective. For (2) I know it's injective but not sure about surjectivity.

Explanation: