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प्रश्न
Let A and B be two sets in the same universal set. Then,\[A - B =\]
विकल्प
(a) \[A \cap B\]
(b)\[A' \cap B\]
(c)\[A \cap B'\]
(d) none of these.
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उत्तर
(c) \[A \cap B'\]
A\[-\]B belongs to those elements of A that do not belong to B.
∴ A\[-\]B =\[A \cap B'\]
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