Question

B and Care sets of real numbers defined as follows.

Answer 1

`\begin{gathered} B\cap C=\phi \\ (-\infty,\text{ 1)}\cup\lbrack9,\infty) \end{gathered}`

Explanation:

Solve this situation with the help of the number line, if B and C are sets of real numbers defined as follow:

The intersection is an interval that lies within all of the given intervals. If no such intersection exists then the set is empty.

In this case, for the intersection between B and C:

`\begin{gathered} B\cap C=\phi \\ \end{gathered}`

For the union between B and C:

`(-\infty,\text{ 1)}\cup\lbrack9,\infty)`