Fuaad solved an absolute value inequality and expressed the solution as [tex][tex]$-12 \ \textless \ x \ \textless \ 7$[/tex][/tex]. What is another way to show Fuaad's solution?

A. [tex][tex]$(-\infty, -12) \cup (7, \infty)$[/tex][/tex]

B. [tex][tex]$(-12, 7)$[/tex][/tex]

C. [tex][tex]$\{x \mid -12 \ \textless \ x \ \textless \ 7\}$[/tex][/tex]

D. [tex][tex]$\{x \mid x \ \textgreater \ -12 \text{ or } x \ \textless \ 7\}$[/tex][/tex]



Answer :

Certainly! Let's carefully examine the inequality given and explore alternative ways to express it.

The inequality provided is:
[tex]\[ -12 < x < 7 \][/tex]

This inequality describes the set of all real numbers [tex]\( x \)[/tex] that lie strictly between -12 and 7. Now, let's consider the different ways we can represent this solution:

1. Interval Notation:
The interval notation for this inequality is:
[tex]\[ (-12, 7) \][/tex]
This notation clearly indicates that [tex]\( x \)[/tex] takes values greater than -12 and less than 7.

2. Set-Builder Notation:
Set-builder notation is another way to express this inequality, where we describe the set of numbers [tex]\( x \)[/tex] that satisfy a certain condition:
[tex]\[ \{ x \mid -12 < x < 7 \} \][/tex]
This reads as "the set of all [tex]\( x \)[/tex] such that [tex]\( x \)[/tex] is greater than -12 and less than 7."

3. Union of Intervals:
The union of intervals is not appropriate here because the solution is a single interval:
[tex]\[ (-\infty, -12) \cup (7, \infty) \][/tex]
This represents values outside the interval from -12 to 7, which does not correspond to our given inequality.

4. Incorrect Set-Builder Form:
The expression below misrepresents the inequality because it combines two separate conditions with "or":
[tex]\[ \{ x \mid x > -12 \text{ or } x < 7 \} \][/tex]
This statement includes values that are less than -12 or greater than 7, which also does not meet our specified range.

Given these representations, the correct alternative way to show Fuaad's solution is:

[tex]\[ \{ x \mid -12 < x < 7 \} \][/tex]

So, the answer is:
[tex]\[ \{ x \mid -12 < x < 7 \} \][/tex]

This representation succinctly and accurately describes the set of values for [tex]\( x \)[/tex] that satisfy the given inequality.

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