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JEE Advanced Mathematics question

MathematicsApplication of DerivativesJEE Advanced

The function is monotonic decreasing in the open interval . Then one value of is

Answer: (A),(C)

Solution

We need on , i.e. there (with equality at most at isolated points).

- : on ✔. Here is *exactly* the interval of decrease. - : ✘. - :

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Question ID VK-110393