Question 111755
You probably entered {{{ln(-1.384)}}} which is undefined. Remember {{{ln(x)=y}}} can be written as {{{e^y=x}}}. Now if x=-1.384, then


{{{e^y=-1.384}}}



Now what number will make e (which is 2.78) go to -1.384? It turns out this is not possible, so there is no such number that will satisfy this equation. So at that point, the equation is undefined.




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However, if we try to solve   ln x = -1.384  (which is not what you typed in), then we can say



{{{e^(-1.384)=0.250574248795}}} 



So {{{x=0.250574248795}}} which is approximate of course