Find the nth term and the indicated term of the arithmetic sequence whose initial term, a, and common difference, d, are given.a = -9; d = 8an = ?; a7 = ?
A. an = -9 + 8n; a7 = 39
B. an = -17 + 8n; a7 = 111
C. an = -17 + 8n; a7 = 39
D. an = -17 - 8n; a7 = 39
Answer: C
Mathematics
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