Show Interval On Number Line....1

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SUMMARY

The discussion centers on representing the interval |x| < 2 on a number line, with the solution being -2 < x < 2. Participants confirm the correct use of parentheses to denote open intervals, indicating that -2 and 2 are not included in the solution. WolframAlpha is highlighted as a valuable tool for visualizing mathematical concepts, particularly for checking answers and understanding interval notation. Users emphasize the importance of clarity in requests for help, especially when seeking explanations rather than just answers.

PREREQUISITES
  • Understanding of interval notation in mathematics
  • Familiarity with number lines and their representations
  • Basic knowledge of inequalities
  • Experience using WolframAlpha for mathematical queries
NEXT STEPS
  • Explore the functionality of WolframAlpha for visualizing mathematical concepts
  • Study interval notation and its applications in algebra
  • Learn about inequalities and their graphical representations
  • Review precalculus resources for deeper understanding of number lines
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Students studying precalculus, educators teaching interval notation, and anyone seeking to improve their understanding of inequalities and number line representations.

mathdad
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Show interval on number line.

|x| < 2

Solution:

-2 < x < 2

<-----(---------)------>

Left side parentheses = -2

Right side parentheses = 2

Correct?
 
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Yes.

Have you heard of WolframAlpha? It's can be a very useful learning tool, especially for checking your answers.

Check this link and take note of the number line down the bottom. Open circles are equivalent to open brackets "(,)" closed circles, "[,]".

Wolfram|Alpha: Computational Knowledge Engine
 
I know about WolframAlpha but I am not looking just for the answer. I need an explanation as I travel through my precalculus textbook.
 
RTCNTC said:
I know about WolframAlpha but I am not looking just for the answer. I need an explanation as I travel through my precalculus textbook.

Then you need to make that clear in your post! In your OP you are asking if your working is correct, WolframAlpha can do the checking for you (for simple problems anyway). If you don't understand something, make it clear.
 

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