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dau coroana sunt 2 ex.!!

Dau Coroana Sunt 2 Ex class=

Răspuns :

A= {1,2} ⇒ CardA=2

5≤ x+2 <9 /-2
3≤ x <7 ⇒ B={3,4,5,6} ⇒ Card B=4

16 ≤ 5x+1 ≤26 /-1
15≤ 5x≤25 /:5
3 ≤ x ≤ 5 ⇒ C={3,4,5} ⇒ Card C=3

D= {0,1,2,3} ⇒ Card D=4

D6 n D30 ={1,2,3,6} = D6

M30 n M45 = {0,90,180...} = M90