Which of the following solutions are written in set notation? Select ALL that apply. (2 poin

Question

(x=4}
(3)
口
{-15}
C-25
• 7

Answer 1

To identify which of the provided options are written in set notation, we need to recognize the format typically used to express a set. Set notation usually includes curly braces {} to enclose the elements of the set.

Let's examine the provided options:

1. (x=4) - This is not in set notation; it's an equation.
2. (3) - This is not in set notation; it is simply a number enclosed in parentheses.
3. 口 - This symbol does not represent set notation.
4. {-15} - This is written in set notation, containing a single element (-15).
5. C-25 - This is not in set notation; it appears to be an expression.
6. • 7 - This symbol is not representative of set notation.

Based on this analysis, the only option written in set notation is {-15}.