EXPLANATION
a) State the inequality:
All the Real numbers greater than 7.
x>7
b) Express the inequality in interval notation:
In order to obtain the interval notation, we must represent with a parenthesis the 7-value because it is not included in the Domain, and then, close the infinite symbol with "]" because it is included in the Domain:
So, the Domain are all Real numbers greater than 7, excluding the 7.
(7,∞]
