From Förberedande kurs i matematik 1

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-	Addition mellan heltalet 1 och det talet <math>\pi</math> ger ett tal som har samma decimalutveckling som <math>\pi</math>, och eftersom <math>\pi</math> är irrationellt är också <math>\pi+1</math> irrationellt.	+	Adding 1 to <math>\pi</math> gives a number with the same decimal expansion as <math>\pi</math>, and since <math>\pi</math> is irrational
		+	then <math>\pi+1</math> must be irrational.
		+
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Current revision

Adding 1 to \displaystyle \pi gives a number with the same decimal expansion as \displaystyle \pi, and since \displaystyle \pi is irrational then \displaystyle \pi+1 must be irrational.