Question

Exercițiul 6 va rog frumos!!​

Answer 1

x + 3 < 7

x < 7 - 3

x < 4

A={0,1,2,3}

B={0, 10,20,30,40,50,60, ...}

A intersectat cu B = {0}

B\A = {10,20,30,40,50,60, ...}

A reunit cu B = {0,1,2,3,10,20,30,40,50, ...}

A\B = {1,2,3}