Question

Det elementele multimii:
A={x∈ R I IxI≤√2}
B={x∈ R I Ix-1I≤√3}
C={x∈ R I IxI>2}
D={x∈ RI Ix+1I≥3}

Answer 1

A= [-√2; √2]

B = [-√3+1 ; √3+1]

C= (-∞;-2) U (2; +∞)

D = (-∞; -4] U [2;+∞)