Question

what is domain of a set ​

Answer 1

Answer:

The domain is the set of all first elements of ordered pairs (x-coordinates). The range is the set of all second elements of ordered pairs (y-coordinates). Only the elements "used" by the relation or function constitute the range. Domain: all x-values that are to be used (independent values).

Step-by-step explanation:

Answer 2

Answer:

Domain of a set is defined as a set of all values for which the given function is valid. Also when you take a value from domain and substitute in the function you will get a range of values called the range of the function.

Example: x + 2 = 5

Here, x can take any value. But to satisfy the equation, the value is 3. Hence 3 is the domain of the function.

Example: x² + 5x + 6 = 0

⇒ x² + 2x + 3x + 6 = 0

⇒ x ( x + 2 ) +3 ( x + 2 ) = 0

⇒ ( x + 2 ) ( x + 3 ) = 0

Therefore the values of x that satisfies the equation are -2 and -3.

Hence -2 and -3 are the domain of the function.

Hope it helped !!