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Mathematics 16 Online
OpenStudy (anonymous):

express the giving logarithm. in terms of common logarithms log6 3.3

OpenStudy (turingtest):

is this\[\log_6(3.3)\]??

OpenStudy (anonymous):

yes

OpenStudy (turingtest):

new to me o-0 what do you have across?

OpenStudy (across):

Perhaps he's being asked to learn how to use one of the four basic properties of logarithms:\[\log_bx=\frac{\log_ax}{\log_ab}.\]

OpenStudy (across):

When he says common logarithms, we naturally assume \(\ln=\log_e\) and \(\log_{10}\).\[\]

myininaya (myininaya):

what is meant by common logarithm?

OpenStudy (anonymous):

@myininaya: A logarithm having the base 10.

myininaya (myininaya):

so we say that is common? i guess that would common since our numeral system is in base 10 lol

OpenStudy (turingtest):

I think that I may have heard base ten referred to as common as well, but just to clarify zeerak that idea makes little sense ion higher math.

OpenStudy (turingtest):

in*

OpenStudy (across):

In the op, he stated "... common logarithm(s)...", so perhaps the natural logarithm is requested as well. ^^

OpenStudy (turingtest):

well, they are gone, so I guess they should just do both to be safe ;)

myininaya (myininaya):

i don't know. this still sounds a little fishy to me. i never heard of expressing blah blah in terms of common logarithms.

OpenStudy (turingtest):

which is why it is nice to have the questioner stick around to clarify.

OpenStudy (across):

I think he just doesn't like the base 6 logarithm and made the question up to express it in terms of something he's more familiar with. :P

myininaya (myininaya):

I'm still not totally convinced common logarithm means to just write in terms of base 10

OpenStudy (turingtest):

wikipedia know is that way http://en.wikipedia.org/wiki/Common_logarithm

OpenStudy (anonymous):

I absolutely agree with myininaya , I too neer heard of something being expressed in commom log.

myininaya (myininaya):

ok ok i lose this one

myininaya (myininaya):

stupid wikipedia always wins

OpenStudy (turingtest):

yes, terminology is still awkward I didn't know either obviously

myininaya (myininaya):

Ok so now I'm convinced

myininaya (myininaya):

I just never heard of the expression which is really weird since I been doing math forever now.

myininaya (myininaya):

expression or terminology whatever you call it

OpenStudy (phi):

Back in the old days, before electronic calculators or computers, people actually used logs to do computations. Back then, log base 10 was a common log as opposed to logs base e.

OpenStudy (phi):

Obviously myi is too young!

myininaya (myininaya):

lol

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