podaj przykład dwóch różnych przedziałów ograniczonych A i B,dla których :
a] Ailoczyn B = A
b] A suma B -A
c] A-B=A
d] A iloczyn B={5}
e] A-B={1}
f] B-A={-7}
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a)
A = <0; 1>
B = (-3; 2)
<0; 1> n (-3; 2) = <0;1>
A n B = A
b)
A = <-3; 8)
B = (-1; 6>
<-3: 8) u (-1; 6> = <-3; 8)
A u B = A
c)
A = <4; 6>
B = (0; 4)
<4; 6> \ (0; 4) = <4; 6>
A \ B = A
d)
A = (0; 5>
B = <5; 7>
(0; 5> n <5; 7> = {5}
A n B = {5}
e)
A = (0; 1>
B = <-2; 1)
(0; 1> \ <-2; 1) = {1}
A \ B = {1}
f)
A = (-7; -2>
B = <-7; -3>
<-7; -3> \ (-7; -2> = {7}
B \ A = {-7}