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Find the Sum of the Sequence $\sum _ { k = 3 } ^ { 5 } \left( k ^ { 2 } - 9 \right)$

Question 227

Multiple Choice

Find the sum of the sequence.
- $\sum _ { k = 3 } ^ { 5 } \left( k ^ { 2 } - 9 \right)$

A) -15
B) 23
C) 10
D) -3

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