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17-08-2014
Mathematics

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How would I work this out in my head, without a calculator??

How would I work this out in my head without a calculator class=

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konrad509 konrad509

17-08-2014

[tex]243^{\frac{4}{5}}=\sqrt[5]{243^4}=\sqrt[5]{(3^5)^4}=\sqrt[5]{(3^4)^5}=3^4=81[/tex]

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