Functions
Functional Series
JEE Main 2022
Grade 12

Question:

Let $f(x) = \frac{2e^{2x}}{e^{2x} + e}$. Find the value of $\sum_{k=1}^{99} f\left(\frac{k}{100}\right)$.

Step-by-Step Solution

Key Concept: Show that $f(x) + f(1-x) = 2$. Pair the 99 terms so that each pair sums to 2, and handle the middle term separately.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: 99

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