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Descoperă regula si continuă șirul cu încă 4 nr a ) 393,396,399,b)681,677,673,c)123,321,234,432,d)207,217,227.e)123,234,336,

Răspuns :

a)393,396,399,402,405,408,411.
b)681,677,673,669,665,661,657.
c)123,321,234,432,345,543,456,654.
d)207,217,227,238,247,257,267.