Найти первообразную функцииа) f(x)=4x ³ - 6x ²б) f(x)=3sin x+2cos xв) f(x)=5x ⁴ - 3x ⁵ г) f(x)=e ˣ + 1\xд) f(x)=x ⅔ - x -⅓ ( ⅔ и -⅓ степени)

Лебедев Дмитрий Сергеевич

Учитель математики

Проверено учителем

Первообразными заданных функций являются: а) F(x)=x42x3+Cbold cap F open paren bold x close paren equals bold x to the fourth power minus 2 bold x cubed plus bold cap C, б) F(x)=-3cos(x)+2sin(x)+Cbold cap F open paren bold x close paren equals negative 3 cosine open paren bold x close paren plus 2 sine open paren bold x close paren plus bold cap C, в) F(x)=x50.5x6+Cbold cap F open paren bold x close paren equals bold x to the fifth power minus 0.5 bold x to the sixth power plus bold cap C, г) F(x)=ex+ln|x|+Cbold cap F open paren bold x close paren equals bold e raised to the bold x power plus l n the absolute value of bold x end-absolute-value plus bold cap C, д) F(x)=0.6x5/31.5x2/3+Cbold cap F open paren bold x close paren equals 0.6 bold x raised to the 5 / 3 power minus 1.5 bold x raised to the 2 / 3 power plus bold cap C. ️ Шаг 1: Нахождение первообразных для многочленов (а, в) Для вычисления используется правило xndx=xn+1n+1+Cintegral of x to the n-th power d x equals the fraction with numerator x raised to the n plus 1 power and denominator n plus 1 end-fraction plus cap C . а) Для f(x)=4x36x2f of x equals 4 x cubed minus 6 x squared: F(x)=4x446x33+C=x42x3+Ccap F open paren x close paren equals 4 center dot the fraction with numerator x to the fourth power and denominator 4 end-fraction minus 6 center dot the fraction with numerator x cubed and denominator 3 end-fraction plus cap C equals x to the fourth power minus 2 x cubed plus cap C в) Для f(x)=5x43x5f of x equals 5 x to the fourth power minus 3 x to the fifth power: F(x)=5x553x66+C=x50.5x6+Ccap F open paren x close paren equals 5 center dot the fraction with numerator x to the fifth power and denominator 5 end-fraction minus 3 center dot the fraction with numerator x to the sixth power and denominator 6 end-fraction plus cap C equals x to the fifth power minus 0.5 x to the sixth power plus cap C ️ Шаг 2: Нахождение первообразной тригонометрической функции (б) Используем табличные значения sin(x)dx=cos(x)+Cintegral of sine x d x equals negative cosine x plus cap C и cos(x)dx=sin(x)+Cintegral of cosine x d x equals sine x plus cap C. б) Для f(x)=3sin(x)+2cos(x)f of x equals 3 sine x plus 2 cosine x: F(x)=-3cos(x)+2sin(x)+Ccap F open paren x close paren equals negative 3 cosine x plus 2 sine x plus cap C️ Шаг 3: Нахождение первообразной экспоненты и логарифма (г) Применяем формулы exdx=ex+Cintegral of e to the x-th power d x equals e to the x-th power plus cap C и 1xdx=ln|x|+Cintegral of 1 over x end-fraction d x equals l n the absolute value of x end-absolute-value plus cap C . г) Для f(x)=ex+1xf of x equals e to the x-th power plus 1 over x end-fraction : F(x)=ex+ln|x|+Ccap F open paren x close paren equals e to the x-th power plus l n the absolute value of x end-absolute-value plus cap C️ Шаг 4: Интегрирование функций с дробными степенями (д) Применяем правило степени для дробных показателей. д) Для f(x)=x2/3x-1/3f of x equals x raised to the 2 / 3 power minus x raised to the negative 1 / 3 power: F(x)=x2/3+12/3+1x-1/3+1-1/3+1+C=x5/35/3x2/32/3+C=0.6x5/31.5x2/3+Ccap F open paren x close paren equals the fraction with numerator x raised to the 2 / 3 plus 1 power and denominator 2 / 3 plus 1 end-fraction minus the fraction with numerator x raised to the negative 1 / 3 plus 1 power and denominator negative 1 / 3 plus 1 end-fraction plus cap C equals the fraction with numerator x raised to the 5 / 3 power and denominator 5 / 3 end-fraction minus the fraction with numerator x raised to the 2 / 3 power and denominator 2 / 3 end-fraction plus cap C equals 0.6 x raised to the 5 / 3 power minus 1.5 x raised to the 2 / 3 power plus cap C Ответ: а) F(x)=x42x3+Cbold cap F open paren bold x close paren equals bold x to the fourth power minus 2 bold x cubed plus bold cap C б) F(x)=-3cos(x)+2sin(x)+Cbold cap F open paren bold x close paren equals negative 3 cosine open paren bold x close paren plus 2 sine open paren bold x close paren plus bold cap C в) F(x)=x50.5x6+Cbold cap F open paren bold x close paren equals bold x to the fifth power minus 0.5 bold x to the sixth power plus bold cap C г) F(x)=ex+ln|x|+Cbold cap F open paren bold x close paren equals bold e raised to the bold x power plus l n the absolute value of bold x end-absolute-value plus bold cap C д) F(x)=0.6x5/31.5x2/3+Cbold cap F open paren bold x close paren equals 0.6 bold x raised to the 5 / 3 power minus 1.5 bold x raised to the 2 / 3 power plus bold cap C Требуется ли вам найти конкретную первообразную, проходящую через заданную точку, или вычислить определенный интеграл для одной из этих функций?

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