Find the sum of the arithmetic sequence.
-1 + 2 + 3 + ... + 329
A) 108,570
B) 53956
C) 54285
D) 108,241

Question

Quizplus · Accepted Answer

The sum of an arithmetic sequence can be found using the formula $S_n = \frac{n}{2}(a_1 + a_n)$, where $S_n$ is the sum of the first $n$ terms, $a_1$ is the first term, $a_n$ is the nth term, and $n$ is the number of terms. Here, $a_1 = 1$, $a_n = 329$, and $n = 329$. Thus, $S_n = \frac{329}{2}(1 + 329) = 164.5 \times 330 = 54285$.

Find the Sum of the Arithmetic Sequence