emily-hall_60b11f1ca2aab
emily-hall_60b11f1ca2aab
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Interessante descobrirmos o número de termos de cada uma delas: (1, 4, 7...,178).....a1 = 1.......r = 3.....an = 178 an = a1 + (n - 1).r 178 = 1 + (n - 1).3 177 = (n - 1).3 59 = n - 1 n = 60 (2, 7, 12,...,177).......a1 = 2........r = 5.…