Chapter 0: Problem 75
Explain why $$|a b|=|a||b|$$ for all real numbers \(a\) and \(b\).
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Chapter 0: Problem 75
Explain why $$|a b|=|a||b|$$ for all real numbers \(a\) and \(b\).
These are the key concepts you need to understand to accurately answer the question.
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Find all numbers \(x\) satisfying the given equation. $$|x+1|+|x-2|=7$$
A shoelace manufacturer guarantees that its 33 -inch shoelaces will be 33 inches long, with an error of at most 0.1 inch. (a) Write an inequality using absolute values and the length \(s\) of a shoelace that gives the condition that the shoelace does not meet the guarantee. (b) Write the set of numbers satisfying the inequality in part (a) as a union of two intervals.
Write each union as a single interval. $$[-2,8] \cup(-1,4)$$
Write each set as an interval or as a union of two intervals. $$\left\\{x:|x-2|<\frac{\varepsilon}{3}\right\\} ; \text { here } \varepsilon>0$$
Write each set as an interval or as a union of two intervals. $$\\{x:|x+6| \geq 2\\}$$
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