Re: LN() & Log() LOG Base
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Re: LN() & Log() LOG Base
I learned that formula from math class :-) it dosent only work with
natural logs, you can use normal logs too:
log base x of y equals log base ANYTHING of y divided by log base
ANYTHING of x
or
log (Y) = log(y)
X -------
log(x)
Information Technology wrote:
> interestingly, how do find that formula? had that on a test once,
> really
> sucked!
>
> In article <01IPUAY4QGT8001AX6@TITAN.SFASU.EDU>, Ben Sultenfuss
> <bsultenfuss@SFASU.EDU> wrote:
>
> > Use the change of base formula
> >
> > log(base a) of x = (ln x)/(ln a)
> >
> > for log(base 2) of 8 enter: ln(8)/ln(2)
> > the result is 3
> >
> > Define the following function
> >
> > Define log2(x)=ln(x)/ln(2)
> >
> > From now on, simily type log2( a number ) on the command
> > line and you will get the log(base 2) of the number.
> > You may have to use the approximate key to avoid the
> > exact result. [diamond][enter]
> > ------------------------------------------------------------------
> > Ben Sultenfuss <bsultenfuss@sfasu.edu>
> > Stephen F. Austin State University
> > Department of Mathematics and Statistics
> > 1936 North Street, PO Box 13040, SFA Station
> > Nacogdoches, Texas 75962-3040
> > Voice: Office: 409-468-3805 Home: 409-560-5508
> > Fax: Office: 409-468-1669 Home: 409-560-0038
> > Office Hours: Mon-Fri 8:00-8:50 am, Mon-Thur 2:00-4:00 pm Local
> >
> > ----------
> > > From: Bobby Atkinson <atkinson1@THEONRAMP.NET>
> > > To: CALC-TI@LISTS.PPP.TI.COM
> > > Subject: LN() & Log() LOG Base
> > > Date: Saturday, November 08, 1997 22:07
> > >
> > > How can I have the TI-92 return a base 2 logarithm of an
> argument.
> > > Bobby Atkinson
> > > atkinson1@theonramp.net
References: