Question

Given the relation A = {(5,2, (7,4), (9,10), (x,5)}. Which of the following values
for x will make relation a function?
A. 7
B. 9
C. 4
D. 5​

Answer 1

Answer:

4

Step-by-step explanation:

In a function, domain can't have two ranges.

For example,

f(x) = a, then the value of f(x) will remain same.

Once you say, f(x) =a, you can't say f(x) = b. If you so, it won't remain a function anymore.

However this can be true only when, a = b.

f(x) = a. It is represented by (x, a).

In the given options,

7 is already paired with 4

5 with 2

9 with 10

Remaining one is (x, 5).

f(7) = 4, it can't be f(7) = 5, eleminate 7.

f(5) = 2, it cant be f(5) = 5, eleminate 5.

f(9) = 10, it cant be f(9)=5, eleminate 9.

Now, we are left with only 1 choice. So that can be the answer '4'.

Answer 2

Answer:

c

Step-by-step explanation: