Question 316967
There is no rule to disprove it but there clearly isn't a rule that proves it.
You only need one example to disprove it.
Example:{{{ln(12+0)=ln(12)*ln(0)}}} doesn't work since {{{ln(0)}}} is undefined but yet ln(12) is defined.
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{{{ln(AB)=ln(A)+ln(B)}}} is the only rule that really works.