Functions Question 624

Question: If $ f(x)= \begin{cases} & x-1,,x<0 \\ & \frac{1}{4},x=0 \\ & ,x^{2},x>0 \\ \end{cases} . $ , then

[Roorkee 1988]

Options:

A) $ \underset{x\to 0+}{\mathop{\lim }},f(x)=1 $

B) $ \underset{x\to 0-}{\mathop{\lim }},f(x)=1 $

C) $ f(x) $ is discontinuous at $ x=0 $

D) None of these

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Answer:

Correct Answer: C

Solution:

Clearly from curve drawn of the given function $ f(x) $ is discontinuous at $ x=0. $