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Z←√R returns the square root of each of the elements in R.
R is a numeric array.
Z is a floating point array whose values are the square root of the elements of R.


Z←L√R returns the Lth root of each of the elements in R.
L and R are numeric arrays.
Z is a floating point array whose values are the Lth root of the elements of R.


For example,

      √⍳4
1 1.414213562 1.732050808 2
      (3√⍳4)*3
1 2 3 4


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