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If , show that attains its minimum value at .
If $f(x) = \log(1 + x) + \frac{1}{1+x}$, show that $f(x)$ attains its minimum value at $x = 0$.
Given: f(x) = \log(1 + x) + \frac{1}{1+x}
To show: f(x) \text{ attains its minimum value at } x = 0
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From ISC 2025 Mathematics Paper 1, question 4(ii).