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Mathematics 9 Online
OpenStudy (anonymous):

log8 32 = ??

OpenStudy (anonymous):

is it \[\log_{8} 32 \]

OpenStudy (anonymous):

is that the question bratgirl?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

are u good with logarithmic math??

OpenStudy (anonymous):

to get the answer, u use property: \[\log_{a} b = \log_{c}b /\log_{c}a \] you let c=10 (use base 10. also called common logarithm)

OpenStudy (anonymous):

it that the easiest wat to do it?

OpenStudy (anonymous):

yes. let me put it this way: \[\log_{8}32=n \implies 8^{n}=32 \] u understand what im doing so far?

OpenStudy (anonymous):

yes and what is next?

OpenStudy (anonymous):

\[8^{n}=32 \implies \ln 8^{n} = \ln32 \implies n \ln8= \ln32\]

OpenStudy (anonymous):

therefore: \[n= \ln 32 / \ln 8\]

OpenStudy (anonymous):

\[n= \ln 2^{5}/ \ln 2^{3} = 5\ln 2/3\ln2= 5/3.\]

OpenStudy (anonymous):

this is the other way to solve it but a bit longer. better use the property i gave u earlier.

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

hope it helps u understanding logarithm

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