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A small exercise — 3 Comments

  1. ((-1)²)^(1/2)) can’t be reduced to (-1)^(2*(1/2)), it’s not commutative … it would be akin to say that sqrt ((-1)²)=1 equals (sqrt(-1))²=i²=-1

    • That is correct, visitor Pelele!!!
      The rule (a^b)^c = a^(bc) is not valid when a is negative, which some people tend to forget.
      (But it is always valid when a is greater than zero.)

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