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milna1
milna1
21.02.2023 09:29 •  Математика

Кминус семь девятых прибавить пять шестых

👇
Ответ:
PolinaPilipenco
PolinaPilipenco
21.02.2023
1/18. Минус 7/9 =-14/18, а 5/6=15/18→ -14/18+15/18=1/18
4,4(6 оценок)
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Ответ:
tseng7788
tseng7788
21.02.2023

Пошаговое объяснение:

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4,6(44 оценок)
Ответ:
derotasgo
derotasgo
21.02.2023
Находим производную Y=2x-3+1 / х
избавляемся от знаменателя, для этого домножим на х: у=2х2-3х+1
решаем уравнение через дискриминант и получаем корни х=1 и х= 0,5
на отрезке отмечаем эти корни и плюс интервал [3/4;5/4], смотрим принадлежат ли эти корни данному интервалу и поолучается, что входит только х=1
теперь в саму функция y = x2 – 3x + lnx + 5 подставляем х
у (3/4)=9/4-9/4+ln3/4+5=ln3/4+5
у (5/4)=25/16-15/4+ln5/4+5
у (1)=1-3+ln1+5=1-3+5=3(это и будет ответом, т. к единственное целое число, а в ЕГЭ стараются подбирать такие числа)
4,6(60 оценок)
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