1 . ∫dxex+e-x

• A. ${\tan }^{-1}\left(e^{-x}\right)$
• B. $\tan \left(e^{-x}\right)$
• C. ${\tan }^{-1}\left(e^x\right)$
• D. $\tan \left(e^x\right)$

Answer: Option C

Explanation:

2 . ∫dxex+e-x=?

• A. ${\tan }^{-1}{e}^x+c$
• B. ${\tan }^{-1}\frac{1}{e^x}+c$
• C. ${\sin }^{-1}{e}^x+c$
• D. কোনটিই নয়

Answer: Option A

Explanation: