Question

Let f={(1,2),(2,3),(5,6),(7,8) evaluate f(2)and f(5)?​

Answer 1

Given:

`f=\{(1,2),(2,3),(5,6),(7,8)\}`

To find:

The values of f(2) and f(5).

Solution:

If an ordered pair
`(x,y)` is in the function
`f`, then
`f(x)=y`.

In the given set of ordered pairs one ordered pair is (2,3). So, by using the above definition, we get

`f(2)=3`

In the given set of ordered pairs one ordered pair is (5,6). So, by using the above definition, we get

`f(5)=6`

Therefore, the value of f(2) is 3 and the value of f(5) is 6.