Problem

Evaluate each expression. See Example.EXAMPLE Evaluating Absolute ValuesEvaluate each expr...

Evaluate each expression. See Example.

EXAMPLE Evaluating Absolute Values

Evaluate each expression.

(a)
(b) − | 8 |
(c) − | −2 |
(d) | 2x |, for x = π

SOLUTION

(a)
(b) −| 8 | = −(8) = −8
(c) −| −2 | = −(2) = −2
(d) | 2p | = 2p

Absolute value is useful in applications where only the size (or magnitude), not the sign, of the difference between two numbers is important.

−| −8 |

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Solutions For Problems in Chapter R.2

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