Mathematics

Mathematics

Problem

Which one of the following sequences is NOT a geometric progression? a) 7, 7, 7, 77,\,7,\,7,\,7 b) −3, 6, −12, 24-3,\,6,\,-12,\,24 c) 3, 6, 12, 253,\,6,\,12,\,25 d) 8, 4, 2, 18,\,4,\,2,\,1

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