Втечении полугода ежемесячный расход электроэнергии в семье был следующий : 148, 148, 125, 126, 112, 115. найдите среднее арифметическое и размах полученных данных

Сред ариф: (148+148+125+126+112+115): 6=774: 6=129 размах=148-112=36

ответ :

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Площадь - интеграл между двумя точками пересечения графиков этих функций по функции 2x^2 (это видно если нарисовать их) точки пересечения можно найти решив систему из этих двух уравнений достаточно эти функции приравнять 2x^2 = 4x x^2 = 2x x = 2 и x = 0 (в второй строке мы поделили на x, это значит что дальнейшее решение не будет учитывать что x = 0 (поскольку на ноль делить нельзя), следовательно нужно дополнить ответ выражением x = 0) это и есть две точки пересечения заданных функций остается вычислить интеграл поскольку нам необходимо найти площадь между двумя функциями, то этого недостаточно, ведь мы нашли площадь между функцией 2x^2 и осью ox этот же интеграл нужно взять и у 4x искомая площадь - разница двух только что найденных