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  4. When x ∈(0,1), function f(x)=1 / √x is-

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Q. When $x \in(0,1)$, function $f(x)=1 / \sqrt{x}$ is-

Application of Derivatives

Solution:

$f^{\prime}(x)=\frac{-1}{2 x \sqrt{x}}$
for $ x \in(0,1) f^{\prime}(x) < 0$
Hence decreasing.