Evaluate the sum.
-$\sum _ { k = 1 } ^ { 9 } ( 7 - 8 k )$

Name: Evaluate the sum. -$\sum _ { k = 1 } ^ { 9 } ( 7 - 8 k )$
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The sum can be evaluated by calculating each term from $k = 1$ to $k = 9$ and then summing them up: $(7 - 8 \times 1) + (7 - 8 \times 2) + \ldots + (7 - 8 \times 9)$. This simplifies to $-1 - 9 - 17 - 25 - 33 - 41 - 49 - 57 - 65 = -297$.

Evaluate the Sum ∑k=19(7−8k)\sum _ { k = 1 } ^ { 9 } ( 7 - 8 k )∑k=19​(7−8k)

Evaluate the Sum $\sum _ { k = 1 } ^ { 9 } ( 7 - 8 k )$