PG entrance exam CUET PG 2025 Mock Test Mathematics Relations and Functions Domain of a Function

\(\mathrm{f}(x)=\cos x-1+\frac{x^{2}}{2!}, x \in \mathbb{R}\) Then f(x) is

1
decreasing function
2
increasing function
3
neither increasing nor decreasing
4
constant ∀x > 0
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