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Use the Indicated Formula to Find the Sum $S = \frac { n ( n + 1 ) } { 2 }$

Question 115

Multiple Choice

Use the indicated formula to find the sum.
-Use $S = \frac { n ( n + 1 ) } { 2 }$ to find the sum of $1 + 2 + 3 + \ldots + 625$ .

A) 195,312
B) 195,625
C) 194,376
D) 195,000

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