Solve ∫ (2x^5+3/x+1/x^9) wrt x

$$\int ( 2 x ^ { 5 } + \frac { 3 } { x } + \frac { 1 } { x ^ { 9 } } ) d x$$

Evaluate

$$3\ln(|x|)+\frac{x^{6}}{3}-\frac{1}{8x^{8}}+С$$

Solution Steps

Integrate the sum term by term.

$$\int 2x^{5}\mathrm{d}x+\int \frac{3}{x}\mathrm{d}x+\int \frac{1}{x^{9}}\mathrm{d}x$$

Factor out the constant in each of the terms.

$$2\int x^{5}\mathrm{d}x+3\int \frac{1}{x}\mathrm{d}x+\int \frac{1}{x^{9}}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{5}\mathrm{d}x with \frac{x^{6}}{6}. Multiply 2 times \frac{x^{6}}{6}.

$$\frac{x^{6}}{3}+3\int \frac{1}{x}\mathrm{d}x+\int \frac{1}{x^{9}}\mathrm{d}x$$

Use \int \frac{1}{x}\mathrm{d}x=\ln(|x|) from the table of common integrals to obtain the result.

$$\frac{x^{6}}{3}+3\ln(|x|)+\int \frac{1}{x^{9}}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int \frac{1}{x^{9}}\mathrm{d}x with -\frac{1}{8x^{8}}.

$$\frac{x^{6}}{3}+3\ln(|x|)-\frac{1}{8x^{8}}$$

If F\left(x\right) is an antiderivative of f\left(x\right), then the set of all antiderivatives of f\left(x\right) is given by F\left(x\right)+C. Therefore, add the constant of integration C\in \mathrm{R} to the result.

$$\frac{x^{6}}{3}+3\ln(|x|)-\frac{1}{8x^{8}}+С$$

Differentiate w.r.t. x

$$2x^{5}+\frac{3}{x}+\frac{1}{x^{9}}$$