Question

Ajutorrrrrrrr,va rog,,,,vreau niste raspunsuri corecte si intregi

Answer 1

exercitiul 3 
a={1,2,3,4,5,6,7}
b={5,10,15}
c={4,8,12}
a)aUb={1,2,3,4,5,6,7,10,15}
b)bUc={4,5,8,10,12,15}
c)aUbUc={1,2,3,4,5,6,7,8,10,12,15}
d)aΠc={4}
e)bΠc={Ф}
f)aU(bΠc)=aU{Ф}={1,2,3,4,5,6,7}
g)(aПb)U(bПc)={5}U{Ф}={5}
h)aUФ=A
i)aПФ=Ф