Question

Determinati AUB,AnB,A-B,B-A specificand cardinalul lor a)A={×,y,z,t}B={a,b,x,y}b)A={m,n,p}B={q,r}c)A={10,20,30,40} B={2•5,3•10,2•10,2•40}d)A={n€N/n mai mic sau egal cu 7}B={n=N*/n cifra para} e)A={n€N*/n=2•p;p mai mic sau egal cu 5}B={m€N/m=3•q q mai mic sau egal cu 3 f)A={x€N/5x-1 mai mic sau egal cu 14}B={y€N*/y=x+1}g) A={x€N/5^x mai mic sau egal cu 125} B={y€N/5 mai mic sau egal cu 4^x mai mic sau egal cu 64}. Va rog e urgent

Answer 1

a) AUB={a,b,x,y,z,t},AnB={x,y},A-B={z,t},B-A={a,b}
b)AUB={m,n,p,q,r},AnB=Ф,A-B=A,B-A=B
c)B={10,30,20,80},AUB={10,20,30,40,80},AnB={10,20,30},A-B={40},B-A={80}
d)A={0,1,2,3,4,5,6,7],B={2,4,6,8}
AUB={0,1,2,3,4,5,6,7,8},AnB={2,4,6},A-B={0,1,3,5,7},B-A={8}
e) A={2,4,6,8},B={0.3.6.9}
AUB={0,2,3,4,6,8,9},AnB={6},A-B={2.4.8},B-A={0.3.9}
f)A={0,1,2,3},B={nu este scrisa bine
g)A={0,1,2,3},B={nu  e scrisa corect

Answer 2

a) A U B= {a,b,x,y,t,z}  A intersectat cu B= {x,y}, A\B= {z,t}, B\A= {a,b}
b) A U B= {m,n,p,q,r}, A inters B= multimea vida A\B= A, B\A= B
c) B= {10,20, 30, 80}, AUB= {10,20,30,40,80}, A inters B= {10,20,30} A\B= {40} B\A={80}
d) A= {0,1,2,3,4,5,6,7}, B= {0,2,4,6,8} A int B= {0,2,4,6}, AUB= {0,1,2,3,4,5,6,7,8}, A\B={1,3,5,7} B\A= {8}
e) A= {2,4,6,8,10} B= {0,3,6,9}, AUB= {0,2,3,4,6,8,9,10}, A int B= {6}, A\B= {2,4,8,10}, B\A= {0,3,9}
f) A= {0,1,2,3} B= nu se poate determina pt ca nu se specifica cine e x
g) A= {0,1,2,3} B= {2,3} AUB= {0,1,2,3} A int B= {2,3}, A\B= {0,1} B\A= mult vida