Consider the sets and . Find the intersection .
Solution
First, let's solve the inequality for set . We understand that the absolute value being greater than 2 means that the quantity inside the absolute value must be either greater than 2 or less than -2.
For , we get:
\begin{align*}
x-1 &> 2 \\
x &> 3
\end{align*}
For .
Next, let's analyze set . The inequality implies that the product of and is negative. This means that and have opposite signs. Based on the zero product property, the solution will be between the two roots of the quadratic equation, which are and .
As a result, .
Now we need to determine the intersection , which consists of elements that are common to both sets and . The set includes numbers greater than 3 and less than -1, and the set includes numbers between 0 and 5.
Therefore, the intersection will only include numbers that are between 3 and 5, because that is the region where the conditions of both sets and are satisfied simultaneously.
The solution is:
We can highlight the final answer as: