Question

Let A = {1, 2, 3, 4} and B = {4, 8, 9, 10}. A function f: A → B given by f = {(1, 4), (2, 8),(3,9), (4,10)} is a …

(1) Many-one function 

(2) Identity function 

(3) One-to-one function 

(4) Into function

Answer 1

(3) One-to-one function

Different elements of A has different images in B. 

∴ It is one-to-one function.