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TcTc
@TcTc
December 2021
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СРОЧНО! ДАЮ 15 БАЛЛОВ
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Valeriya0286
Найдем корни уравнения
ײ-16×+63≥0
ײ-16×+63=0
D=b²-4ac=16²-(4*63)=4
x1=(-b+√D)/2a=(16+2)/2=9
x2=(-b-√D)/2a=(16-2)/2=7
(x-9)*(x-7)=0
больше 0 на промежутке от 7 до 9
Ответ: 3
1 votes
Thanks 1
TcTc
Огромное спасибо, человек!
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Answers & Comments
ײ-16×+63≥0
ײ-16×+63=0
D=b²-4ac=16²-(4*63)=4
x1=(-b+√D)/2a=(16+2)/2=9
x2=(-b-√D)/2a=(16-2)/2=7
(x-9)*(x-7)=0
больше 0 на промежутке от 7 до 9
Ответ: 3