Question: 68. -22, -19, -16, -13, ... a. a =-25(3)' b. a =-25+3 C. a = 3n - 25 d. a = 3n - 16 69.

68. -22, -19, -16, -13, ... a. a =-25(3)' b. a =-25+3 C. a = 3n - 25 d. a = 3n - 16 69. Find the sum of the first 18 terms of the arithmetic sequence, if the first term is -2 and the common differen is 6. a. 882 b. 1764 C. 900 d. 588 15
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