From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	Exactly as in exercise c, we write the left-hand side as <math>10^{-x}</math>, and the right-hand side as <math>0\textrm{.}0001 = 10^{-4}</math>, i.e. <math>10^{-x} = 10^{-4}</math>, which gives <math>x=4\,</math>.
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Current revision

Exactly as in exercise c, we write the left-hand side as \displaystyle 10^{-x}, and the right-hand side as \displaystyle 0\textrm{.}0001 = 10^{-4}, i.e. \displaystyle 10^{-x} = 10^{-4}, which gives \displaystyle x=4\,.