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JEE Advanced Mathematics question

MathematicsApplication of DerivativesJEE Advanced

Let be a function such that . Then

Answer: (B)

Solution

. The quadratic , and , so

f'(x) Missing argument for \frac\frac83 - 1 = Missing argument for \frac\frac53 > 0 for all x.

So is strictly inc

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Question ID VK-109149