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a) (4; 20) direct proportional cu (3; 15)
b) (4,5; 6) direct proportional cu (1,5; 2)
c) (0,1; 0,(3); 1,2) direct proportional cu (0,3; 1; 3,6)
d) (1; 5; 7; 13; 21) direct proportional cu (3; 15; 21; 26; 63)
ajutati-ma maine dau test!!