Target Exam

CUET

Subject

Section B1

Chapter

Continuity and Differentiability

Question:

If $f(x) = x^2 \sin \frac{1}{x}$, where $x \neq 0$, then the value of the function $f$ at $x = 0$, so that the function is continuous at $x = 0$, is

Options:

$0$

$-1$

$1$

None of these

Correct Answer:

$0$

Explanation:

The correct answer is Option (1) → $0$ ##

Given, $f(x) = x^2 \sin \left( \frac{1}{x} \right)$, where $x \neq 0 \quad \left[ ∵-1 \leq \sin \frac{1}{x} \leq 1, \forall x \in R \right]$

Both $x^2$ and $\sin \frac{1}{x}$ are continuous functions, $\forall x \in R$

Hence, value of the function $f$ at $x = 0$, so that it is continuous at $x = 0$ is $0$.