Class 12 Applications Of Derivatives · Mcq Single Correct1 Marksmonotonicity
Class 12 Maths · Applications Of Derivatives · Mcq Single Correct #19
For which real b is f(x)=x+cos x+b strictly decreasing on R?
✅ Step-by-Step Solution
Final Answer: Option (B): No such b exists
- f′=1−sin x≥0, and it is positive except at isolated points. The function is strictly increasing for every b.
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