Question

A={5,6,7} B={6,7,8,9} find A-(A-B)

Answer 1

Answer:

A-(A-B)={6,7}

Step-by-step explanation:

A={5,6,7}

B={6,7,8,9}

A-B= The elements of A is not in the Element of B

A-B={5,6,7} -{6,7,8,9}

A-B={5}

A-(A-B)={5,6,7} -{5}

A-(A-B)={6,7}