Q
quykhuyetdanh


[tex]1: \int\limits_{0}^{\frac{\pi}{2}}ln(x+\sqrt{1+x^2})dx[/tex]
[tex]2: \int\limits_{\frac{1}{\sqrt{5}}}^{1}\frac{\sqrt{3+x^2}dx }{x^6}[/tex]
[tex]2: \int\limits_{\frac{1}{\sqrt{5}}}^{1}\frac{\sqrt{3+x^2}dx }{x^6}[/tex]