Respuesta :

mhanifa

Answer:

The set U includes all positive integers from 1 to 20.

a)

x is subset U and 14 < x ≤ 23, then x is:

  • x = {15, 16, 17, 18, 19, 20}

b)

x is subset U and includes multiples of 4, so x is:

  • x = {4, 8, 12, 16, 20}

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