Logaritmo, inversa del exponente

ln(e(x)) = x

loga(x⋅y)=loga(x)+loga(y)

loga(x/y)=loga(x)−loga(y)

loga(xb)=b⋅loga(x)

loga(1)=0

loga(a)=1

limx→+∞loga(x)=+∞

limx→0+loga(x)=−∞