Definición de logaritmo
Si a>0a>0, a1a\neq1, b>0b>0, el logaritmo debba la baseaa es el número cc tal que ac=ba^c=b. Escribe: c=logabc=\log_a b (“base logarítmicaaadebbes igualcc”). Singularidad: para fijoa,ba,b, cc es único (porque axa^x es estrictamente monótono R\mathbb{R} para a>0a>0, a1a\neq1). Dominio del símbolologab\log_a benbb: solo b>0b>0. baseaa: solo a>0a>0 y a1a\neq1.
leerlogab=c\log_a b=ccomo la pregunta inversa aac=ba^c=b
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