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Mathematics 22 Online
OpenStudy (anonymous):

Help me on this problem (Intemediate level)

OpenStudy (anonymous):

\[\huge \log10(x-1)^{3} - 3\log10(x-3)= \log 10(8)\]

OpenStudy (anonymous):

\[Find \huge logx(625)\]

OpenStudy (math_genius123):

Solution log10 (8) - 1/3 Log10 (x) = log10 (2) or, log10(8) - log 10 (x^1/3) = log10 (2) or, log10 (8/x^1/3) = log 10 ( 2) Equating both side we get ( 8/ x^ 1/3 ) = 2 or 4 = x^ 1/3 solving the above equation we get x = 4 ^ 3 ==> x = 64

OpenStudy (anonymous):

I am getting 4 as the answer

OpenStudy (anonymous):

@iambatman

OpenStudy (anonymous):

@Zale101

OpenStudy (anonymous):

@satellite73

OpenStudy (anonymous):

i can't read this sucker

OpenStudy (anonymous):

\[ \log(x-1)^{3} - 3\log(x-3)= \log (8)\] like that?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

sucker ?

OpenStudy (anonymous):

ok lets write it as a single log

OpenStudy (anonymous):

I am getting 4

OpenStudy (anonymous):

\[\log\left(\frac{(x-1)^3}{(x-3)^3}\right)=\log(8)\]

OpenStudy (anonymous):

this looks ugly so lets make it look like \[3\log(\frac{x-1}{x-3})=\log(8)\]

OpenStudy (anonymous):

nope, i like it better the other way

OpenStudy (anonymous):

I am getting 4 as the answer

OpenStudy (anonymous):

get \[(\frac{x-1}{x-3})^3=8\] and so \[\frac{x-1}{x-3}=2\]

OpenStudy (anonymous):

seems unlikely, let me check it

OpenStudy (anonymous):

\[x-1=2(x-3)\\ x-1=2x-6\\x=5\]

OpenStudy (anonymous):

logx(625) x=4

OpenStudy (anonymous):

oooh ok i didn't see the last part

OpenStudy (anonymous):

\[\log_5(625)=4\] got it

OpenStudy (anonymous):

Thank you for help!!

OpenStudy (anonymous):

yw you did all the work

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