Thanks for quick reply.
We have some reply that are not quite getting along with each other.
Mathematically, you can take an odd root of a negative number. Also
those 2 statements are equivalent mathematically [(-3)^(-2/3) =
((-3)^(-2))^(1/3)] and should not yield an imaginary number.
This question seems to be very interesting.

Lmn.

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