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Mathematics 6 Online
OpenStudy (anonymous):

1 - 2log7^x (7 is the base)

OpenStudy (anonymous):

Is this even possible? to subtract a log from a number?

OpenStudy (rajee_sam):

1 can be written as a log Log a to the base a is = 1

OpenStudy (rajee_sam):

\[\log_{a} a = 1\]

OpenStudy (rajee_sam):

here your base is 7 . So express it as log and continue like we did the last problem

OpenStudy (anonymous):

ok

OpenStudy (rajee_sam):

can you show me your expression after you wrote 1 as a log

OpenStudy (anonymous):

I'm still kinda confused on changing 1 into a log

OpenStudy (anonymous):

oh waitttt

OpenStudy (rajee_sam):

\[\log_{a} a = 1\]

OpenStudy (rajee_sam):

here we need to have a base of 7

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

so log7 and then 1/x? I'm sure that's wrong.

OpenStudy (rajee_sam):

\[\log_{7} 7 = 1\] why 1/x, what is that?

OpenStudy (rajee_sam):

now we have\[\log_{7} 7 - 2\log_{7} X\] You write them as a single log like we did our earlier problem

OpenStudy (anonymous):

and it'll come out as a fraction, right?

OpenStudy (rajee_sam):

log then fraction

OpenStudy (anonymous):

ok so log7 7/x^2 ?

OpenStudy (rajee_sam):

Fantastic \[\log_{7} 7 - 2 \log_{7} X = \log_{7} 7 - \log_{7} X ^{2}\]\[= \log_{7} \frac{ 7 }{ X ^{2} }\]

OpenStudy (anonymous):

yeahhhhhhh!!!!!

OpenStudy (anonymous):

Thanks again.

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