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PLEASE HELP!! EVALUATE

A. 36

B. 8

C. 24

D. 40

PLEASE HELP!! EVALUATE A. 36 B. 8 C. 24 D. 40-example-1
User Tom Makin
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1 Answer

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The sum of integers n from n1 to n2 is given by the Gauss formula



\sum_(k=n1)^(n2)k=(n2-n1+1)(n2+n1)/(2)


=(8-1+1)(8+1)/(2)


=(8)(9)/(2)

=36

User Liango
by
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