Question

fie A={1;√5;-√16;-4 supra 3; √0,4; 0; √1003
determinati multimile a) A intersectionat Z; b) A intersectionat Q, c)A/N; d)N intersectionat  A; e)A reunit R; f) A/(R-Q); g)A/R; h) A intersectionat R; i)A/Z; j)A intersectionat (R/Q).

va rog,puteti sa-mi explicati ca n-am inteles deloc acestea,va rog ajutati-ma.

Answer 1

A={1,√5,-4,-4/3, √0,4,0,√1003}
a)Z={-n,...-3,-2,-1,0,1,2,3...n}
Aintersectat Z={-4,0,1,}
b)Aintersectat Q={-4/3}
c)A/N={-4}
d)Ninters.A={0,1}
e)AUR={1,√5,-4,-4/3, √0,4,0,√1003}
f)A/(R-Q)={√5, √0,4, √1003}
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