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dvs2504
dvs2504
07.02.2022 09:49 •  Алгебра

Кінетична енергія тіла виражається формулою E=\frac{mv^{2} }{2} Виразіть з цієї формули швидкість тіла v.

З наведених варіантів оберіть номер правильної відповіді:
1. v=√2mE
2. v=√\frac{2m}{E}
3. v=√\frac{2E}{m}
4. v=√\frac{2}{mE}

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Ответ:
iulia085
iulia085
10.11.2021 03:59

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Must Waste More Time...

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Ответ:
cvetlana15a
cvetlana15a
10.08.2022 06:19
Если А и В лежат по одну сторону от прямой, то расстояние от середины отрезка до прямой равно полусумме расстояний от концов отрезка до этой прямой.
Если лежат по разные стороны от прямой, то полуразности этих расстояний. (12-4)/2 = 4 см.
 
На промежутке [-2π/3;0] функция  cosx возрастает, а у=-2xcosx - убывает. Числа 19 -18/π -постоянные, они не влияют на поведение функции. Наибольшее значение при х = -2π/3.
Оно равно 19-2*cos(-2π/3)-18/π = 19-2*(-1/2) -18/π = 20-18/π.
 Это в том случае, если косинус х.( без скобок).
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