Question

Question: Which function in exercise 12 is onto?

Short answer

Answer:

Only the function in part a) and d)

Step-by-step solution

Step: 1

$$\begin{gathered} a)f(n)=n-1 \\ b)f\left(n\right)=n^2+1 \\ c)f(n)=n^3 \\ d)f\left(n\right)=⌈n/2⌉ \end{gathered}$$

Only the function in part a) and d)