Algebra

If U = {x} (x is an integer, 1< x < 5) and P = {1, 2, 5}, what is the complement of P (P')? (There should be a _ under < which makes it less than equal to
Is my answer B ?

A. {1, 2, 5}

B. ( 3, 4)

C. ( 1, 2, 3, 4, 5}

D. (2, 3, 4)

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asked by Mary
  1. Correct!

    Tests:
    1. P∪P'={1,2,5}∪{3,4}={1,2,3,4,5}=U
    2. P∩P'={1,2,5}∩{3,4}=∅
    3. U-P={1,2,3,4,5}-{1,2,5}={3,4}=P'

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