ImmortalFusedZamasu ImmortalFusedZamasu

15-07-2018
Mathematics

contestada

PLEASE HELP!! EVALUATE

A. 36

B. 8

C. 24

D. 40

PLEASE HELP EVALUATEA 36B 8C 24D 40 class=

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mathmate mathmate

15-07-2018

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

[tex]\sum_{k=n1}^{n2}k=(n2-n1+1)\frac{n2+n1}{2}[/tex]

[tex]=(8-1+1)\frac{8+1}{2}[/tex]

[tex]=(8)\frac{9}{2}[/tex]

=36

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