zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的微积分 >

积分 (x(1+3x^2)^5)/2

解答

积分

\frac{x ( 1 + 3 x ^{2} ) ^{5}}{2}

解答

\frac{1}{8} (2 x^{2} + 15 x^{4} + 60 x^{6} + 135 x^{8} + 162 x^{10} + 81 x^{12}) + C

求解步骤

\int \frac{x ( 1 + 3 x ^{2} ) ^{5}}{2} d x

提出常数:

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

= \frac{1}{2} \cdot \int x (1 + 3 x^{2})^{5} d x

乘开

x (1 + 3 x^{2})^{5} : x + 15 x^{3} + 90 x^{5} + 270 x^{7} + 405 x^{9} + 243 x^{11}

= \frac{1}{2} \cdot \int x + 15 x^{3} + 90 x^{5} + 270 x^{7} + 405 x^{9} + 243 x^{11} d x

使用积分加法定则:

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

= \frac{1}{2} (\int x d x + \int 15 x^{3} d x + \int 90 x^{5} d x + \int 270 x^{7} d x + \int 405 x^{9} d x + \int 243 x^{11} d x)

\int x d x = \frac{x ^{2}}{2}

\int 15 x^{3} d x = \frac{15 x ^{4}}{4}

\int 90 x^{5} d x = 15 x^{6}

\int 270 x^{7} d x = \frac{135 x ^{8}}{4}

\int 405 x^{9} d x = \frac{81 x ^{10}}{2}

\int 243 x^{11} d x = \frac{81 x ^{12}}{4}

= \frac{1}{2} (\frac{x ^{2}}{2} + \frac{15 x ^{4}}{4} + 15 x^{6} + \frac{135 x ^{8}}{4} + \frac{81 x ^{10}}{2} + \frac{81 x ^{12}}{4})

化简

\frac{1}{2} (\frac{x ^{2}}{2} + \frac{15 x ^{4}}{4} + 15 x^{6} + \frac{135 x ^{8}}{4} + \frac{81 x ^{10}}{2} + \frac{81 x ^{12}}{4}) : \frac{1}{8} (2 x^{2} + 15 x^{4} + 60 x^{6} + 135 x^{8} + 162 x^{10} + 81 x^{12})

= \frac{1}{8} (2 x^{2} + 15 x^{4} + 60 x^{6} + 135 x^{8} + 162 x^{10} + 81 x^{12})

解答补常数

= \frac{1}{8} (2 x^{2} + 15 x^{4} + 60 x^{6} + 135 x^{8} + 162 x^{10} + 81 x^{12}) + C

作图

流行的例子

in t e g r a l \frac{2}{t ^{3}}

积分 x/(sin^2(x^2))

in t e g r a l \frac{x}{sin ^{2} ( x ^{2} )}

in t e g r a l \frac{x}{16}

积分 (cos^2(2x))/(sin(2x))

in t e g r a l \frac{cos ^{2} ( 2 x )}{sin ( 2 x )}

in t e g r a l - 3 sin (x)