INTEGRALS CONTAINING x2+a2

1.

$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle2}+a^{\displaystyle2}}=\displaystyle \frac{1}{a}\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

2.
$\displaystyle \int\displaystyle \frac{x\,dx}{x^{\displaystyle2}+a^{\displaystyle2}}=\displaystyle \frac{1}{2}\ln(x^{\displaystyle2}+a^{\displaystyle2})$

3.
$\displaystyle \int\displaystyle \frac{x^{\displaystyle2}\,dx}{x^{\displaystyle2}+a^{\displaystyle2}}=x-a\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

4.
$\displaystyle \int\displaystyle \frac{x^{\displaystyle3}\,dx}{x^{\displaystyle2... ...laystyle \frac{a^{\displaystyle2}}{2}\ln(x^{\displaystyle2}+a^{\displaystyle2})$

5.
$\displaystyle \int\displaystyle \frac{dx}{x(x^{\displaystyle2}+a^{\displaystyle... ...aystyle \frac{x^{\displaystyle2}}{x^{\displaystyle2}+a^{\displaystyle2}}\right)$

6.
$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle2}(x^{\displaystyle2}... ...yle \frac{1}{a^{\displaystyle3}}\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

7.
$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle3}(x^{\displaystyle2}... ...aystyle \frac{x^{\displaystyle2}}{x^{\displaystyle2}+a^{\displaystyle2}}\right)$

8.
$\displaystyle \int\displaystyle \frac{dx}{(x^{\displaystyle2}+a^{\displaystyle2... ...le \frac{1}{2a^{\displaystyle3}}\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

9.
$\displaystyle \int\displaystyle \frac{x\,dx}{(x^{\displaystyle2}+a^{\displaysty... ...splaystyle2}}=\displaystyle \frac{-1}{2(x^{\displaystyle2}+a^{\displaystyle2})}$

10.
$\displaystyle \int\displaystyle \frac{x^{\displaystyle2}\,dx}{(x^{\displaystyle... ...e2})}+\displaystyle \frac{1}{2a}\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

11.
$\displaystyle \int\displaystyle \frac{x^{\displaystyle3}\,dx}{(x^{\displaystyle... ...aystyle2})}+\displaystyle \frac{1}{2}\ln(x^{\displaystyle2}+a^{\displaystyle2})$

12.
$\displaystyle \int\displaystyle \frac{dx}{x(x^{\displaystyle2}+a^{\displaystyle... ...aystyle \frac{x^{\displaystyle2}}{x^{\displaystyle2}+a^{\displaystyle2}}\right)$

13.
$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle2}(x^{\displaystyle2}... ...le \frac{3}{2a^{\displaystyle5}}\tan^{\displaystyle-1}\displaystyle \frac{x}{a}$

14.
$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle3}(x^{\displaystyle2}... ...aystyle \frac{x^{\displaystyle2}}{x^{\displaystyle2}+a^{\displaystyle2}}\right)$

15.
$\displaystyle \int\displaystyle \frac{dx}{(x^{\displaystyle2}+a^{\displaystyle2... ...laystyle \frac{dx}{(x^{\displaystyle2}+a^{\displaystyle2})^{\displaystyle n-1}}$

16.
$\displaystyle \int\displaystyle \frac{x\,dx}{(x^{\displaystyle2}+a^{\displaysty... ...le \frac{-1}{2(n-1)(x^{\displaystyle2}+a^{\displaystyle2})^{\displaystyle n-1}}$

17.
$\displaystyle \int\displaystyle \frac{dx}{x(x^{\displaystyle2}+a^{\displaystyle... ...aystyle \frac{dx}{x(x^{\displaystyle2}+a^{\displaystyle2})^{\displaystyle n-1}}$

18.
$\displaystyle \int\displaystyle \frac{x^{\displaystyle m}\,dx}{(x^{\displaystyl... ...splaystyle m-2}\,dx}{(x^{\displaystyle2}+a^{\displaystyle2})^{\displaystyle n}}$

19.
$\displaystyle \int\displaystyle \frac{dx}{x^{\displaystyle m}(x^{\displaystyle2... ...x^{\displaystyle m-2}(x^{\displaystyle2}+a^{\displaystyle2})^{\displaystyle n}}$

[Tables]

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