Y must be a numeric array. X must be a numeric array. R is numeric. The value of R is X raised to the power of Y.
If Y is zero, R is defined to be 1.
If X is zero, Y must be non-negative.
In general, if X is negative, the result R is likely to be complex.
2*2 ¯2 4 0.25 9 64*0.5 3 8 ¯27*3 2 1.2 .5 ¯19683 729 ¯42.22738244J¯30.67998919 0J5.196152423