From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	If we write <math>0\textrm{.}1</math> as <math>10</math> raised to some power, then we have <math>0\textrm{.}1 = 10^{-1}</math> and therefore <math>x=-1\,</math>.
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If we write \displaystyle 0\textrm{.}1 as \displaystyle 10 raised to some power, then we have \displaystyle 0\textrm{.}1 = 10^{-1} and therefore \displaystyle x=-1\,.