No Logarithm of a Negative NumberDate: 8/6/96 at 21:22:36 From: Anonymous Subject: Logarithm of Negative Number Hello, Please tell me how to solve this problem: log(-5) = ? Date: 8/6/96 at 21:47:11 From: Doctor Robert Subject: Re: Logarithm of Negative Number Since a logarithm is an exponent, your question is equivalent to the question "What power of 10 gives me -5?" Positive exponents of 10 do not give negative results, and neither do negative exponents. The answer is that you cannot find the logarithm of a negative number (at least, not over the set of real numbers). I hope that this helps. -Doctor Robert, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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