Answer
$-7$
Work Step by Step
RECALL:
(i) $\ln{e^x}=x$
(ii) $\dfrac{1}{a^m} = a^{-m}$
Use rule (ii) above to obtain:
$=\ln{e^{-7}}$
Use rule (i) above to obtain:
$\ln{e^{-7}} = -7$
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