Question

efectuati: A reunit cu B; A\B ;B\A ;A intersectat cu N ;B intersectat cu Z :
a) A= [ -2;5]
B=[ -1;9]
b) A=[-4;7]
B=(5;14)
c) A=[ -7;2)
B=(-5;8)
d) A=(-4;9)
B=[-1;6]

Answer 1

a) AUB=[-2,9]
A\B=[-2,-1)
B\A=(5,9]
A intersectat cu N= {0,1,2,3,4,5 }
B intersectat cu Z={-1 ,0 ,1, 2, 3 ,4 , 5,6 , 7 ,8 ,9}
b) AUB=[-4,14)
A\B=[-4,5]
B\A=(7,14)
A intersectat cu N ={0,1,2,3,4,5,6,7}
B intersectat cu Z ={6,7,8,9,10,11,12,13}
c)AUB=[-7,8)
A\B=[-7,-5)
B\A=(2,8)
A intersectat cu N = {0 , 1}
B intersectat cu Z = {-4,-3,-2,-1,0,1,2,3,4,5,6,7}
d)AUB=(-4,6]
A\B=(-4,-1)U (6,9)
B\A=MULȚIMEA VIDA
A intersectat cu N ={0,1,2,3,4,5,6,7,8}
B intersectat cu Z = {-1,0,1,2,3,4,5,6}