29-05-2018
Mathematics

contestada

what is the sum of the series?
20
sigma (5-n)
n-1

A-220
B-110
C-95
D110

Respuesta :

jdoe0001 jdoe0001

29-05-2018

[tex]\bf \sum\limits_{n=1}^{20}~5-n\implies \sum\limits_{n=1}^{20}~5~~-~~\sum\limits_{n=1}^{20}~n\implies 20\cdot 5~~-~~\cfrac{20(20+1)}{2} \\\\\\ 100~~-~~210\implies -110[/tex]

Answer Link

torashine98 torashine98

04-05-2022

Answer:

B. -110

Step-by-step explanation:

Answer Link

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