JEE Main · 2025 · 24 Jan 2025 · Shift 1 · Differential Equations

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Let f be a differentiable function such that
, . Then is equal to ____.

Answer: 19

Solution

Differentiating the given relation with respect to :


Dividing by :


This is linear: , with integrating factor .



To fix , evaluate the original equation at : .



JEE Main · 2025 · 24 Jan 2025 · Shift 1 · Integer answer

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