tich phan kho lam cac ban oi

H

hoanghondo94

Mình tính nguyên hàm, bạn tự thế cận vào nhé!:D

[TEX]{\color{Blue} \int \frac{x+1}{\sqrt{x^2+x+1}}dx=\frac{1}{2}\int \frac{2x+1}{\sqrt{x^2+x+1}}dx+\frac{1}{2}\int \frac{dx}{\sqrt{x^2+x+1}} \\\\ =\frac{1}{2}\int \frac{d(\sqrt{x^2+x+1})}{\sqrt{x^2+x+1}}+\frac{1}{2}\int \frac{dx}{\sqrt{x^2+x+1}} \\\\ =\frac{1}{3}\left ( x^2+x+1 \right )\sqrt{x^2+x+1}+\frac{1}{2}\ln\left | x+\frac{1}{2}+\sqrt{\left ( x+\frac{1}{2} \right )^2+\frac{3}{4}} \right |[/TEX]
:D
 
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