Functions Question 344

Question: In order that the function $ f(x)={{(x+1)}^{1/x}} $ is continuous at $ x=0 $ , $ f(0) $ must be defined as

[MNR 1989]

Options:

A) $ f(0)=0 $

B) $ f(0)=e $

C) $ f(0)=1/e $

D) $ f(0)=1 $

Show Answer

Answer:

Correct Answer: B

Solution:

$ \underset{x\to 0}{\mathop{\lim }}f(x)=f(0)=\underset{x\to 0}{\mathop{\lim }},{{(1+x)}^{1/x}}=e. $