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cazanca
@cazanca
July 2022
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Запишите первые три члена арифметической прогрессии 20 17 14 какое число стоит на 91-м месте
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mmb1
Verified answer
20 17 14
a1=20
a=a2-a1=17-20=-3
a91=a1+(n-1)*d=20+90*(-3)=20-270=-250
37 votes
Thanks 73
vennassty
Д=17-20=-3
А91=а1+д(91-1)
А91= 20-3*90
А91= -250
19 votes
Thanks 33
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Answers & Comments
Verified answer
20 17 14a1=20
a=a2-a1=17-20=-3
a91=a1+(n-1)*d=20+90*(-3)=20-270=-250
А91=а1+д(91-1)
А91= 20-3*90
А91= -250