Solution 3.3:5e
From Förberedande kurs i matematik 1
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- | {{ | + | The argument of ln can be written as |
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- | {{ | + | {{Displayed math||<math>\frac{1}{e^{2}} = e^{-2}</math>}} |
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+ | and with the logarithm law, <math>\ln a^{b} = b\ln a</math>, we obtain | ||
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+ | {{Displayed math||<math>\ln \frac{1}{e^{2}} = \ln e^{-2} = (-2)\cdot\ln e = (-2)\cdot 1 = -2\,\textrm{.}</math>}} |
Current revision
The argument of ln can be written as
\displaystyle \frac{1}{e^{2}} = e^{-2} |
and with the logarithm law, \displaystyle \ln a^{b} = b\ln a, we obtain
\displaystyle \ln \frac{1}{e^{2}} = \ln e^{-2} = (-2)\cdot\ln e = (-2)\cdot 1 = -2\,\textrm{.} |