Find the sum.
-1 + 2 + 3 + ... + 536
A)143916
B)143380
C)287,832
D)287,296

Name: Find the sum. -1 + 2 + 3 + ... + 536 A)143916 B)143380 C)287,832 D)287,296
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Quizplus · Accepted Answer

The sum of an arithmetic series can be found using the formula $S = \frac{n}{2}(a_1 + a_n)$, where $S$ is the sum, $n$ is the number of terms, $a_1$ is the first term, and $a_n$ is the last term. Here, $n = 536$, $a_1 = 1$, and $a_n = 536$. Plugging these into the formula gives $S = \frac{536}{2}(1 + 536) = 268(537) = 143,916$.

Find the Sum. -1 + 2 + 3 + ... + 536