ja

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

人気のある微分積分 >

integral of ((3x-2))/(5x^2-3x+2)

解

\int \frac{( 3 x - 2 )}{5 x ^{2} - 3 x + 2} d x

解

20 (3 (\frac{1}{200} ln 100 x^{2} - 60 x + 40 + \frac{3}{100 31} arctan (\frac{10 x - 3}{31})) - \frac{1}{5 31} arctan (\frac{10 x - 3}{31})) + C

解答ステップ

\int \frac{3 x - 2}{5 x ^{2} - 3 x + 2} d x

平方完成する

5 x^{2} - 3 x + 2 : 5 (x - \frac{3}{10})^{2} + \frac{31}{20}

= \int \frac{3 x - 2}{5 ( x - \frac{3}{10} ) ^{2} + \frac{31}{20}} d x

u置換積分法を適用する

= \int \frac{20 ( 3 ( u + \frac{3}{10} ) - 2 )}{100 u ^{2} + 31} d u

定数を除く:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 20 \cdot \int \frac{3 ( u + \frac{3}{10} ) - 2}{100 u ^{2} + 31} d u

拡張

\frac{3 ( u + \frac{3}{10} ) - 2}{100 u ^{2} + 31} : \frac{3 ( u + \frac{3}{10} )}{100 u ^{2} + 31} - \frac{2}{100 u ^{2} + 31}

総和規則を適用する:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 20 (\int \frac{3 ( u + \frac{3}{10} )}{100 u ^{2} + 31} d u - \int \frac{2}{100 u ^{2} + 31} d u)

\int \frac{3 ( u + \frac{3}{10} )}{100 u ^{2} + 31} d u = 3 (\frac{1}{200} ln 100 u^{2} + 31 + \frac{3}{100 31} arctan (\frac{10}{31} u))

\int \frac{2}{100 u ^{2} + 31} d u = \frac{1}{5 31} arctan (\frac{10}{31} u)

= 20 (3 (\frac{1}{200} ln 100 u^{2} + 31 + \frac{3}{100 31} arctan (\frac{10}{31} u)) - \frac{1}{5 31} arctan (\frac{10}{31} u))

代用を戻す

u = x - \frac{3}{10}

= 20 (3 (\frac{1}{200} ln 100 (x - \frac{3}{10})^{2} + 31 + \frac{3}{100 31} arctan (\frac{10}{31} (x - \frac{3}{10}))) - \frac{1}{5 31} arctan (\frac{10}{31} (x - \frac{3}{10})))

簡素化

20 (3 (\frac{1}{200} ln 100 (x - \frac{3}{10})^{2} + 31 + \frac{3}{100 31} arctan (\frac{10}{31} (x - \frac{3}{10}))) - \frac{1}{5 31} arctan (\frac{10}{31} (x - \frac{3}{10}))) : 20 (3 (\frac{1}{200} ln 100 x^{2} - 60 x + 40 + \frac{3}{100 31} arctan (\frac{10 x - 3}{31})) - \frac{1}{5 31} arctan (\frac{10 x - 3}{31}))

= 20 (3 (\frac{1}{200} ln 100 x^{2} - 60 x + 40 + \frac{3}{100 31} arctan (\frac{10 x - 3}{31})) - \frac{1}{5 31} arctan (\frac{10 x - 3}{31}))

定数を解答に追加する

= 20 (3 (\frac{1}{200} ln 100 x^{2} - 60 x + 40 + \frac{3}{100 31} arctan (\frac{10 x - 3}{31})) - \frac{1}{5 31} arctan (\frac{10 x - 3}{31})) + C

グラフ

人気の例

derivative f(x)= 3/(1+x^2)

d er i v a t i v e f (x) = \frac{3}{1 + x ^{2}}

integral from 0 to 1 of 3x^2(x^3+5)^{-2}

\int_{0}^{1} 3 x^{2} (x^{3} + 5)^{- 2} d x

integral of sin(5pi)t

\int sin (5 π) t d t

2 y^{^{''}} - 8 y = 0

derivative of-e^x(x-7)

\frac{d}{d x} (- e^{x} (x - 7))