.8 Theorem 3.11: let a and b be two finite set with AFBl, and let f be an everywhere function from a to B. Then 8(1)Iff is one to one, then f is onto. 令(2川 ifis onto, then f is one to one. . The prove are left your exercises.❖ Theorem 3.11: Let A and B be two finite set with |A|=|B|, and let f be an everywhere function from A to B. Then ❖ (1)If f is one to one, then f is onto. ❖ (2)If f is onto, then f is one to one. ❖ The prove are left your exercises