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Use the Formula for the Sum of the First N $\sum _ { i = 1 } ^ { 25 } ( 2 i - 7 )$

Question 37

Multiple Choice

Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.
- $\sum _ { i = 1 } ^ { 25 } ( 2 i - 7 )$

A) 587.5
B) 475
C) 675
D) 450

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