MCQ
$\int \frac{e^x}{e^{2 x}+e^x+1} d x=\ldots \ldots . .+c$
- A$\frac{1}{\sqrt{3}} \sec ^{-1}\left(\frac{2 e^x+1}{\sqrt{3}}\right)$
- B$\tan ^{-1}\left(1+e^x\right)$
- ✓$\frac{2}{\sqrt{3}} \tan ^{-1}\left(\frac{2 e^x+1}{\sqrt{3}}\right)$
- D$\frac{1}{\sqrt{3}} \tan ^{-1}\left(\frac{e^x+1}{\sqrt{3}}\right)$