How can I find the derivative of a function say, f(n) = ln(n), where n is a natural number?(adsbygoogle = window.adsbygoogle || []).push({});

In other words, how can find g(x) in the following equation:

f(x) + g(x) = f(x+1)

I know there isn't a general formula for this, but are there some techniques to find g(x) for a specific equation f(x)?

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# How can one find the dervative of a function

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