Question

The right hand and left hand limit of the function
f(x) = \left\\{ \begin{aligned} & \frac{e^{1/x}-1}{e^{1/x}+1}\ \ ,\ \ \text{if x}\ne0 \\\ & \ \ \ \ \ \ 0 \ \ \ \ \ \ \ \ ,\ \ \text{if x = 0} \end{aligned} \right.
are respectively

• A. 1 and 1
• B. 1 and -1
• C. -1 and -1
• D. -1 and 1

Answer 1

Answer: (B)

1 and -1

Answer 2

The correct answer is (B) : 1 and -1.