Evaluate the sum.
-$$\sum _ { j = 4 } ^ { 15 } ( 7 j + 8 )$$
A) 866
B) 789
C) 894
D) 761

Name: Evaluate the sum. -\[\sum _ { j = 4 } ^ { 15 } ( 7 j + 8 )\] A) 866 B) 789 C) 894 D) 761
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Question

Quizplus · Accepted Answer

The sum can be evaluated by calculating each term from j=4 to j=15 and then summing them up. The expression is linear, so the sum can also be calculated using the formula for the sum of an arithmetic series. The sum is 894.

Evaluate the Sum ∑j=415(7j+8)\sum _ { j = 4 } ^ { 15 } ( 7 j + 8 )j=4∑15​(7j+8)

Evaluate the Sum $\sum _ { j = 4 } ^ { 15 } ( 7 j + 8 )$