PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! What is (98 - 2n) equal to?

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asked Dec 20, 2020 859 views

2 votes

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

What is (98 - 2n) equal to?

Mathematics
high-school

Chuck Lantz asked

by Chuck Lantz

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1 Answer

3 votes

Answer: 946

Explanation:

$\sum^(11)_(1)(98-2n)\\\\a_1=98-2(1)\\.\quad=98-2\\.\quad=96\\\\a_(11)=98-2(11)\\.\quad=98-22\\.\quad=76\\\\\\S_n=(a_1+a_(11))/(2)\cdot 11\\\\.\quad=(96+76)/(2)\cdot11\\\\.\quad=(172)/(2)\cdot11\\\\.\quad=86\cdot11\\\\.\quad=946$

Leo Odishvili answered Dec 25, 2020

by Leo Odishvili

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