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On a Casio calculator you can obtain the power root

      

 


Example 1

To calculate 664 = 2

 6          6   4  =  6x√64
           2.
 

 


Example 2

To calculate 0.52 = 21/0.5 = 22 = 4

    5               2  =  .5x√2
           4.
 

 


Example 3

To calculate 1−7 = −7

 1         (−)  7  = 1x-7              
-7.   
 

 


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