Lösung 1.3:3e
Aus Online Mathematik Brückenkurs 1
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Version vom 13:34, 22. Okt. 2008
The number 9 can be written as \displaystyle 9=3\cdot 3=3^{2} and hence the denominator in the expression is equal to
| \displaystyle 9^{2} = (3^{2})^{2} = 3^{2\cdot 2} = 3^{4}\,. |
The whole quotient becomes
| \displaystyle \frac{3}{9^{2}}=\frac{3^{1}}{3^{4}}=3^{1-4}=3^{^{-3}}. |
