Question

$\log(1 + e^{x})$

• A. $- \log(1 + e^{- x})$
• B. $- \log(1 - e^{- x})$
• C. $\log(e^{- x} + e^{- 2x})$
• D. None of these

Answer 1

Answer: (B)

$- \log(1 - e^{- x})$

Answer 2

Let $\int_{}^{}{\frac{a^{\sqrt{x}}}{\sqrt{x}}dx =}$

Therefore $2a^{\sqrt{x}}\log_{e}a + c$

$2a^{\sqrt{x}}\log_{a}e + c$