Find the sum of the first n terms of the sequence.
-7, 10, 13, 16, . . . ; n = 8
A) 171
B) 112
C) 140
D) 152

Name: Find the sum of the first n terms of the sequence. -7, 10, 13, 16, . . . ; n = 8 A) 171 B) 112 C) 140 D) 152
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Quizplus · Accepted Answer

The sequence is an arithmetic sequence with the first term a = 7 and common difference d = 3. The sum of the first n terms of an arithmetic sequence is given by S_n = n/2 * (2a + (n-1)d). For n = 8, S_8 = 8/2 * (2*7 + (8-1)*3) = 4 * (14 + 21) = 4 * 35 = 140.

Find the Sum of the First N Terms of the Sequence