Domain of function $f(x)=cos^{-1}\sqrt{2x-1}$ is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $\left[\frac{1}{2}, 1\right]$
$f(x)=\cos^{-1}\sqrt{2x-1}$
$0≤2x-1≤1⇒1≤2x≤2$
$\frac{1}{2}≤x≤1⇒x∈\left[\frac{1}{2}, 1\right]$