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4-142.

If $h\left(x\right) = \left(x + 2\right)^{−1}$ , find:

$h\left(3\right)$
Hint (a):
$h\left(3\right) \\= \left(3 + 2\right)^{−1} \\= 5^{−1}$
Answer (a):
$h(3)=\frac{1}{5}$

$h\left(−3\right)$
Hint (b):
$h\left(−3\right) \\= \left(−3 + 2\right)^{−1}\\ = \left(−1\right)^{−1}$

$h\left(a − 2\right)$
Hint (c):
See part (b).

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