$\int \frac{d x}{x^{2}-x+1}$ এর মান নির্ণয় কর।

$\frac{1}{\sqrt{3}} \tan ^{-1}\left(\frac{2 \mathrm{x}-1}{\sqrt{3}}\right)+\mathrm{C}$

$\frac{2}{\sqrt{3}} \tan ^{-1} 1\left(\frac{2 x-1}{\sqrt{2}}\right)+C$

$\frac{1}{\sqrt{3}} \tan ^{-1}\left(\frac{2 x-1}{\sqrt{2}}\right)+C$

$\frac{2}{\sqrt{3}} \tan ^{-1}\left(\frac{2 x-1}{\sqrt{3}}\right)+C$