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  • 01-10-2016
  • Mathematics
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The six is in the dent in the square root sign and 128 is under it

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  • 02-10-2016
remember
[tex] \sqrt[n]{x^m} =x^ \frac{m}{n} [/tex]

so
128=2^7
[tex] \sqrt[6]{2^7} =2^ \frac{7}{6} [/tex]=[tex](2^ \frac{6}{6})(2^ \frac{1}{6})=2 \sqrt[6]{2} [/tex]

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