CUET · MATHS · PYQ PAPER 2025
The function \(f: R \rightarrow R\) defined as \(f(x)=x^2+2 x\) is
- A decreasing in \((-\infty,-1]\)
- B increasing in \((-\infty,-1]\)
- C decreasing in \((-\infty, 2]\)
- D increasing on \(R\)
Answer & Solution
Correct Answer
(A) decreasing in \((-\infty,-1]\)
Step-by-step Solution
Detailed explanation
\(f(x)=x^2+2x\) \(f'(x) = 2x+2\) \(f'(x) Function is decreasing in \((-\infty, -1]\)
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