Given `A={2,\ 3,\ 4}` , `B={2,\ 5,\ 6,\ 7}` . Construct an example of an injective map from `A` to `B` .

Explanation

Let a function` f:A->B `where for every `x_1,x_2 in X, f(x_1)=f(x_2) implies x_1=x_2` is called a one-one or injective function.

Now let `f:A->B` denotes a mapping such that

`f={(x,y):y=x+3`

we can write it in roster form as

`f={(2,5),(3,6),(4,7)}`

So, this is an injective mapping.