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Fagkakdt
@Fagkakdt
August 2022
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Помогите, пожалуйста (´༎ຶ ͜ʖ ༎ຶ `)♡
Найдите сумму первых 22 членов арифметической прогрессии -5, -2, 1, …
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nac5cdexge
A22=a1+21d
a1=-5 ,a2=-2,a3=1,d=3 ( d=а2-а1)
a22= -5 + 21*3= 63-5=58
ответ:58
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Answers & Comments
a1=-5 ,a2=-2,a3=1,d=3 ( d=а2-а1)
a22= -5 + 21*3= 63-5=58
ответ:58