defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Differential Calculus Applications of Derivatives
The interval, in which the function \(f(x)=\frac{3}{x}+\frac{x}{3}\) is strictly decreasing, is:
1
(-∞, -3) ∪ (3, ∞)
2
(-3, 3)
3
(-3, 0) ∪ (0, 3)
4
\(\mathbb{R}-\{0\}\)