Найдите производную функции h(x)=3/x v(h)=-1/h+3h f(x)=2/3x+3x^2 f(x)=x^3(5x-1)(1-2x)

Лебедев Дмитрий Сергеевич

Учитель математики

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Производные заданных функций: h(x)=3x2h prime of x equals negative the fraction with numerator 3 and denominator bold x squared end-fraction , v(h)=1h2+3v prime open paren h close paren equals the fraction with numerator 1 and denominator bold h squared end-fraction plus 3 , f(x)=23x2+6xf prime of x equals negative the fraction with numerator 2 and denominator 3 bold x squared end-fraction plus 6 bold x и f(x)=-50x4+28x33x2f prime of x equals negative 50 bold x to the fourth power plus 28 bold x cubed minus 3 bold x squared. Шаг 1: Производные элементарных функций h(x) и v(h) Для нахождения производной h(x)=3xh of x equals 3 over x end-fraction представим функцию в виде степени: h(x)=3x-1h of x equals 3 x to the negative 1 power. Используя правило (xn)=nxn1open paren x to the n-th power close paren prime equals n x raised to the n minus 1 power, получаем h(x)=3(-1)x-2=3x2h prime of x equals 3 center dot open paren negative 1 close paren x to the negative 2 power equals negative the fraction with numerator 3 and denominator x squared end-fraction . Для функции v(h)=1h+3hv open paren h close paren equals negative 1 over h end-fraction plus 3 h аналогично записываем v(h)=h-1+3hv open paren h close paren equals negative h to the negative 1 power plus 3 h. Производная суммы равна сумме производных: v(h)=(-1)h-2+3=1h2+3v prime open paren h close paren equals negative open paren negative 1 close paren h to the negative 2 power plus 3 equals the fraction with numerator 1 and denominator h squared end-fraction plus 3 . Шаг 2: Дифференцирование f(x) = 2/(3x) + 3x^2 Запишем первое слагаемое как 23x-1two-thirds x to the negative 1 power . Применяем правила дифференцирования: f(x)=(23x-1)+(3x2)=23(-1)x-2+32x=23x2+6xf prime of x equals open paren two-thirds x to the negative 1 power close paren prime plus open paren 3 x squared close paren prime equals two-thirds center dot open paren negative 1 close paren x to the negative 2 power plus 3 center dot 2 x equals negative the fraction with numerator 2 and denominator 3 x squared end-fraction plus 6 x Шаг 3: Дифференцирование произведения f(x) = x^3(5x - 1)(1 - 2x) Для упрощения сначала раскроем скобки в выражении: (5x1)(12x)=5x10x21+2x=-10x2+7x1open paren 5 x minus 1 close paren open paren 1 minus 2 x close paren equals 5 x minus 10 x squared minus 1 plus 2 x equals negative 10 x squared plus 7 x minus 1Теперь умножим на x3x cubed: f(x)=x3(-10x2+7x1)=-10x5+7x4x3f of x equals x cubed open paren negative 10 x squared plus 7 x minus 1 close paren equals negative 10 x to the fifth power plus 7 x to the fourth power minus x cubedНаходим производную от каждого слагаемого: f(x)=-105x4+74x33x2=-50x4+28x33x2f prime of x equals negative 10 center dot 5 x to the fourth power plus 7 center dot 4 x cubed minus 3 x squared equals negative 50 x to the fourth power plus 28 x cubed minus 3 x squaredОтвет:

  1. h(x)=3x2h prime of x equals negative the fraction with numerator 3 and denominator bold x squared end-fraction v(h)=1h2+3v prime open paren h close paren equals the fraction with numerator 1 and denominator bold h squared end-fraction plus 3 f(x)=23x2+6xf prime of x equals negative the fraction with numerator 2 and denominator 3 bold x squared end-fraction plus 6 bold x f(x)=-50x4+28x33x2f prime of x equals negative 50 bold x to the fourth power plus 28 bold x cubed minus 3 bold x squared

Нужно ли вам разобрать решение через правило производной произведения для последней функции или вычислить значение производной в конкретной точке?

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