Saved Bookmarks
| 1. |
\frac{x^{2}}{\left(x^{2}+a^{2}\right)\left(x^{2}+b^{2}\right)}=k\left[\frac{a^{2}}{x^{2}+a^{2}}-\frac{b^{2}}{x^{2}+b^{2}}\right] |
| Answer» | |