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Kirito102
@Kirito102
August 2022
2
5
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Пятый и седьмой члены арифметической прогрессии равны 3,5 и 8,25 соответственно. Чему равен шестой член этой прогрессии?
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zarembo73
Verified answer
A(5)=3,5; a(7)=8,25; a(6)=(3,5+8,25)/2=5,875.
Ответ: 5,875.
3 votes
Thanks 4
ЕкарныйБабай
Verified answer
A5=a1+4d
a7=a1+6d
a6=a1+5d
a5+a7=a(a1+5d)=2a6
2a6=3.5+8.25=11.75
a6=5.875
3 votes
Thanks 3
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Answers & Comments
Verified answer
A(5)=3,5; a(7)=8,25; a(6)=(3,5+8,25)/2=5,875.Ответ: 5,875.
Verified answer
A5=a1+4da7=a1+6d
a6=a1+5d
a5+a7=a(a1+5d)=2a6
2a6=3.5+8.25=11.75
a6=5.875