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a fost răspuns

1] 3•2n+1+7•2n+2+5•2n
2] 4•2n+2+5•2n+1+7•2n
3] 5•3n+7•3n+5•3n+1
4] 7•4n+2+4n+1+5•4n


1 32n172n252n 2 42n252n172n 3 53n73n53n1 4 74n24n154n class=