an hypotenuse (math.) be tantamount to x (a>0 and a not be tantamount to 1), then Number n is called the base x logarithms (logarithm) of a, denote n=logax. where a is called the logarithms Base , x is called the truth number, and n is called the "base x logarithms of a". logarithms Base , x is called the true number, and n is called "base x logarithms on a".

In particular, we call logarithms with base 10 common logarithms, and denote them as lg.

We call logarithms based on the irrational number e (e=2.71828...)

The logarithms with irrational number e (e=2.71828...) are called Nature logarithms (natural logarithm) and are denoted as ln.

Zero has no logarithms.

Zero has no logarithms.

Zero has no logarithms.