Sequences and Series**

What is the sum of the first five terms of the geometric series . 16 807 – 2401 + 343 – . . .? A . 19 607 . B . 14 707 . C . 16 807.29 . D . 14 706.25. 4. The numbers represented by a, b and c are the first three terms of an arithmetic. sequence. The number c, when expressed in terms of a and b, would be represented by. A ................
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