Физика 7 класс

y=x*3+1/cosx найти производную

X*X+Y*Y=5 X*X*XY+XY*Y*Y=10

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Информатику ставят первым или шестым уроком, причем на информатику к первому уроку приходит только первая подгруппа, а на последний урок остается только вторая подгруппа, остальные предметы расставляются в произвольном порядке. Сколькими способами можно составить расписание на этот день?

Помогитеееее!!!!

В 1 на 3 больше чем в другом
Сколько уч. в каждом классе?

разделить эту сумму между тремя классами ?

классе, если известно, что 22 ученика сдали оба экзамена, а остальные по одному Решение, посянение, плжалуйста