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junior college 1 | H2 Maths
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Why is the answer c for this qn?
Date Posted: 4 years ago
Views: 440
Work backwards.
From the question we know that :
3 < x < 5
The idea is to get both sides to be the negatives of each other first.
3 - 4 < x - 4 < 5 - 4
-1 < x - 4 < 1
Then we can rewrite as :
|x - 4| < 1
From the question we know that :
3 < x < 5
The idea is to get both sides to be the negatives of each other first.
3 - 4 < x - 4 < 5 - 4
-1 < x - 4 < 1
Then we can rewrite as :
|x - 4| < 1
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done
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This website explains the concept of inequalities with absolute brackets well. take a look https://www.mathplanet.com/education/algebra-1/linear-inequalitites/solving-absolute-value-equations-and-inequalities
Date Posted:
4 years ago
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