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completeaza fiecare sir cu inca trei numere: a)123;234;.........; b)990;875;........; c)132;153;.......;

Răspuns :

a) 123, 234, 345, 456, 567,678,789
b) 132, 153 , 174, 195, 216
A) 123,234,345,456,567, B)990,875,850,825,800 C) 132,153,174,195,210