Question

b) A U întors B ={3,5}; c) A-B={1,6}

Answer 1

A U B={1,2,3,4,5,6,7}
A U intors B={3,5}
A-B={1,6}

A={3,5,1,6}
B={3,5,2,4,7}

Answer 2

A U B={1,2,3,4,5,6,7}
A U intors B={3,5}
A-B={1,6}

A={3,5,1,6}
B={3,5,2,4,7}