Teaching UP TGT Mock Test Series 2025 Mathematics Differential Calculus Applications of Derivatives

The function \(f(x) = ax + \frac{b}{x};a,b,x > 0\)  takes on the least value at x equal to

1
b
2
\(\sqrt { a} \)
3
\(\sqrt {b } \)
4
\(\sqrt {b/ a} \)
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