daniiltpgatov6
24.08.2020 01:31

Найти все принадлежащие промежутку (-π; 2π) решения неравенства ctg< 1 (делать с графиком)​

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Ответ:
mysll8
07.11.2020 21:09

Пусть х (дней) печатала одна типография, тогда вторая печатала

(х - 2) дня.

15 000х экземпляров  -  напечатала одна типография

10 000 (х - 2) экземпляров  -  напечатала вторая

Всего 250 000 экземпляров.

Составим уравнение:

15 000х + 10 000 * (х - 2) = 250 000

15 000х + 10 000х - 20 000 = 250 000

25 000х = 270 000

х = 270 000 : 25 000

х = 10,8 (дней) - округляем до целого ≈ 11 дней

ответ: весь тираж был напечатан за 11 дней.

По действиям:

1) 15 000 * 2 = 30 000 экз. - напечатала одна типография (пока вторая простаивала)

2) 250 000 - 30 000 = 220 000 экз. - печатали вместе

3) 15 000 + 10 000 = 25 000 экз./день - общая производительность

4) 220 000 : 25 000 = 8,8 дня

5) 8,8 + 2 = 10,8 ≈ 11 дней

ответ: тираж напечатали за 11 дней.

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Ответ:
07Лизочек07
04.07.2022 06:50

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