The smallest set A such that A ∪ 1, 2 = 1, 2, 3, 5, 9 is: - Vidyadip

MCQ

The smallest set A such that A ∪ {1, 2} = {1, 2, 3, 5, 9} is:

A
{2, 3, 5}
B
{3, 5, 9}
C
{1, 2, 5, 9}
D
{1, 2}

✓

Answer

{3, 5, 9}

Solution:

A ∪ {1, 2} = {1, 2, 3, 5, 9}

Thus,

A = {1, 2, 3, 5, 9} − {1, 2}

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