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View Full Version : whats the answer to dis one???helppppppppppppp!!!


pokipok
Apr26-05, 11:52 AM
3log_6 - log_6 12 + log_6 2 = ???? (the base is 6)





whats the vertical asymptote, x-intercept, range and domain for this one -
log_x 4

CRGreathouse
Apr26-05, 12:03 PM
Use the basic properties of logarithms:

log_b(xy) = log_b(x) + log_b(y)
log_b(x^y) = y log_b(x)
log_b(x/y) = log_b(x) - log_b(y)

dextercioby
Apr26-05, 12:09 PM
As for the second,use

\log_{4}x=\frac{\ln x}{\ln 4}

Daniel.

pokipok
Apr27-05, 09:48 AM
As for the second,use

\log_{4}x=\frac{\ln x}{\ln 4}

Daniel.


how did u get dat?
logx4 = In x/In 4??

HallsofIvy
Apr27-05, 11:27 AM
Saying "y= log4 x" is the same as saying "x= 4y". Now take the logarithm (with whatever base you want- log10 or ln if you want to use a calculator): log x= log 4[sup]y[/sup= y log 4 so y= log x/log 4.

pokipok
Apr28-05, 07:55 AM
Saying "y= log4 x" is the same as saying "x= 4y". Now take the logarithm (with whatever base you want- log10 or ln if you want to use a calculator): log x= log 4[sup]y[/sup= y log 4 so y= log x/log 4.



x is the base not 4, logx4,, how oh how do u?

HallsofIvy
Apr28-05, 09:14 AM
What do you want to do with logx 4? If you x is a given number, then you would find log[sub]x[sub]4, just as before: (log 4)/(log x). Again, the log can be either base 10 or natural log whichever is easier.

pokipok
Apr28-05, 10:48 AM
What do you want to do with logx 4? If you x is a given number, then you would find log[sub]x[sub]4, just as before: (log 4)/(log x). Again, the log can be either base 10 or natural log whichever is easier.



find the domain, range ang x-intercept y=logx4