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.