Question

Write the set and set build a notation and an interval notation

Answer 1

To determine the set and write the a notation and interval rotation:

Let the set of all values on the number line be x

`\begin{gathered} \mleft\lbrace x\text{I }x\text{ }\leq\text{ -}\infty\mright]\}\text{ meaning} \\ The\text{ set of all x values on the number line that are less than and equal to -13} \end{gathered}`

Therefore the set buider is represented below:

`\mleft\lbrace x\text{ I }x\leq-\infty\mright\rbrace\mleft\lbrace-\infty\leq x\leq-13\mright\rbrace`