I have heard that $\log x$ is actually supposed to be $\ln x$. I don't think that's true.

Question

parthkohli · Answer

Because ln is different, and log base 10 is different.

ash2326 · Answer

log to the base e is ln
$$\log_e x =\ln x$$

parthkohli · Answer

Yeah, I knew it :D

parthkohli · Answer

Now I'd accuse him for confusing me ;)

ash2326 · Answer

and log x is not necessarily 10, the base can be anything greater than 0 but not 1
$$\log_b a,\ b>0, b\ne 1$$

anonymous · Answer

lnx = 2.303log(10)x

parthkohli · Answer

Yeah @UnkleRhaukus you meant $\ln x = \log _e x$ :P

unklerhaukus · Answer

yeah i did,

parthkohli · Answer

But log x is supposed to be $\log _{10} x$, when the base is not given

unklerhaukus · Answer

for an unspecified base i would assume base 10

parthkohli · Answer

Yep :)

unklerhaukus · Answer

unless when using Wolfram

parthkohli · Answer

Wolfram gets confused lol

ash2326 · Answer

It's the properties of log, you can use any base  as long you don't have it specified.
Most of the log tables are either to base 10 or e

parthkohli · Answer

But an unspecified base is def. 10

ash2326 · Answer

Nope, that's not necessary. Because base 10 is common, we use it mostly

anonymous · Answer

If base is not given, then it is assumed as Log having 10 base...