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# log of -ve number is not possible.

Note by Rajat Jain
3 years, 11 months ago

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A note: logarithms can be extended for negative numbers if you consider complex numbers. See here. · 3 years, 11 months ago

More accurately, logarithms can be extended to all non-zero complex numbers.

You have to be careful, as it is no longer a one-to-one function, but multivalued (which some people do not consider as a function). Staff · 3 years, 11 months ago