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Mathematics 21 Online
OpenStudy (anonymous):

evaluate the expression ln e^18? show work

OpenStudy (anonymous):

@phi ??

OpenStudy (phi):

ln (short for "natural log" who knows why the letters are backwards... ln ... maybe Logarithm Natural) anyway, the main idea is that "ln" undoes exponentiation... if you have e^x ln (e^x) gives you x in other words, if you want the little number to the upper right of e, put ln in front of it

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