Vi definerer logartimen til et positivt tall $a$ på denne måten:
\n\n\\[\\log_ba=c \\Longleftrightarrow a=b^c \\space \\text{der $b>0$ er grunntallet.}\\]
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\n$\\log_\\var{f}(x)=\\var{f1}$
\n$x=$ [[0]]
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", "$a^{\\log_a(x)}$
", "$e^{\\ln(x)}$
", "$\\log_{10}(x)$
", "$\\log_e(x)$
", "$\\ln(e^x)$
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