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JEE Advanced Mathematics question

MathematicsDefinite IntegrationJEE Advanced

is equal to

Answer: (A)

Solution

Take out so the sum looks like a Riemann sum:

=Missing argument for \frac\frac1n·=Missing argument for \frac\frac1n· .

With and , where gives :

Missing argument for \frac\frac1n

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Question ID VK-109481