Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Relations and Functions

Question:

The domain of function $f(x)=\frac{\sqrt{4-x^2}}{\sin^{-1}|x|}$ is

Options:

[–1, 1]

[–2, 2]

[-1, 0) ∪ (0, 1]

[-2, 0) ∪ (0, 2]

Correct Answer:

[-1, 0) ∪ (0, 1]

Explanation:

$f(x)=\frac{\sqrt{4-x^2}}{\sin^{-1}|x|}$

$⇒4-x^2≥0$

So $x^2≤4$

so $-2≤x≤2⇒x∈[-2,2]$

so $\sin^{-1}|x|⇒1≥|x|≥0=-1≤x≤1-\{0\}$

$x∈[-1,1]-\{0\}$

So $x∈[-1, 0) ∪ (0, 1]$