\( x \leq \) Exactly right. High fivel 2. Show the full solution Express the answer to Question 1 in set notation, by choosing from the options and filling in the value of \( a \) Answer: \( x \in[a ; \infty) \) \( x \in(-\infty ; a) \) \( x \in(-\infty ; a] \) \( x \in[-\infty ; a] \)

To solve the inequality \( x \leq a \), we need to express the solution in set notation. 1. **Understanding the inequality**: The inequality \( x \leq a \) means that \( x \) can take any value that is less than or equal to \( a \). 2. **Set notation**: In set notation, we express the solution as a set of all possible values of \( x \) that satisfy the inequality. - The values of \( x \) that satisfy \( x \leq a \) include all numbers from negative infinity up to and including \( a \). 3. **Choosing the correct option**: The correct set notation for the solution \( x \leq a \) is: \[ x \in (-\infty; a] \] Thus, the answer is: \[ x \in (-\infty; a] \]