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DashaSuslova202
@DashaSuslova202
June 2022
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Найти первый член арифметической прогрессии,если а8=14,d=7
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ShirokovP
Verified answer
A8 = a1 + 7d = 14
a1 = 14 - 7d = 14 - 7*7 = 14 - 49 = - 35
2 votes
Thanks 2
Lesben
A8=14,d=7,a1=?
a8=a1+7d, a1=a8-7d
a1=14-7.7,a1=14-49
a1=-35
========
2 votes
Thanks 1
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Answers & Comments
Verified answer
A8 = a1 + 7d = 14a1 = 14 - 7d = 14 - 7*7 = 14 - 49 = - 35
a8=a1+7d, a1=a8-7d
a1=14-7.7,a1=14-49
a1=-35
========