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WB JEE 2024

MCQ+1 / -0.252024

যদি \(\mathbf{f}: \mathbb{R} \rightarrow \mathbb{R}\) যেখানে \(f(x)=\frac{\mathrm{e}^{|x|}-\mathrm{e}^{-x}}{\mathrm{e}^x+\mathrm{e}^{-x}}\), তবে f অপেক্ষকটি

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