Math Challenges

Submissions for Problem #1

Express the following two sets (separately, two questions) using interval notation.

\[ \begin{align} \{x|x\ne5\} \\ \{x|2\lt x\le6 \mathrm{\ or\ } x=8\} \end{align} \]

fish-face

Solution: \( \displaylines{\left(-\infty,5\right)\cup\left(5,+\infty\right)\\ \left(2,6\right\rbrack\cup\left\lbrack8,8\right\rbrack} \)

zapwai

Solution: \( \displaylines{\left(-\infty,5\right)\cup\left(5,\infty\right)\\ \left(2,6\right\rbrack\cup\left\lbrace8\right\rbrace} \)