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15.stabiliti valoarea de adevar a propozitiilor
a{-2,-1,0,1,2} inclus dublu in z
b.{0,1,2,...,2020} inclus in dublu z
c.{-1,0,1,2} inclus in dublu n
d.{-2020,-2019,2020} inclus in dublu z


Răspuns :

Răspuns:

a={0,1,2}

b={1,2,2020}

a. Adevărat
b. Adevărat
c. Fals
d. Adevărat