Limit Question: Solving with a Helpful Link

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That answer is not the limit, it's what you would have gotten had you taken the derivative correctly.

To find the derivative of (1 + x)^(1/x) write Log[(1 + x)^(1/x)] = Log[1+x] / x. Say this has derivative y, which means (Log f(x))' = y = f'(x)/f(x), so f'(x) = y f(x).