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Which of the following is NOT a real number? (Please explain why!)

(1) -1 (I already ruled out this answers because integers can be real numbers)
(2) square root of 3
(3)square root of -3

  • Math - ,

    Real numbers include rational, irrational, integers, and natural numbers. Real numbers form a subset of complex numbers. So when a number is not real, it is usually complex.

    Can you spot a complex number from the list?

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