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Logaritmefunktionerne

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log(x)=y svarer til 10^y

10 kaldes her for grundtallet for logaritmefunktionen

log (underforstået: log 10)også kaldet 10-talslogaritmen

Den naturlige logaritmefunktion (logaritmen med grundtal e), der betegnes ln, er den funktion, der opfylder:

log_e(x)= ln(x)

Det naturlige tal (Eulers tal) e= 2,71828...

Den naturlige eksponentialfunktion: e^x

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