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@20leks00
August 2022
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Найдите сумму всех отрицательных членов арифметической прогрессии -8,6; -8,4 ...
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almichik
-17,2
0=-8,6+(n-1)*0.2
8,6+0,2=0,2n
n=44
((2*(-8,6+0,2(44-1))/2)*4=(-17,2+8,6)*2
3 votes
Thanks 5
almichik
=-17,2 забыл))))))))
20leks00
))))
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Answers & Comments
0=-8,6+(n-1)*0.2
8,6+0,2=0,2n
n=44
((2*(-8,6+0,2(44-1))/2)*4=(-17,2+8,6)*2