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Mathematics 15 Online
OpenStudy (anonymous):

2041^2n=243^n+2

OpenStudy (anonymous):

what is the question :)

OpenStudy (anonymous):

uhhh, find n?? :P

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

i'm gonna use log to solve this, is that ok?? it's the weirdest method, i know :P

OpenStudy (anonymous):

Log would be helpfil

OpenStudy (anonymous):

i have NO clue of what i've done, (lol) btu the answer i've got is 1.127. Should i show the working??

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so after putting log on both sides, and then you bring down the indices on both sides, and you get \[2n \log_{}2041 = n+2\log_{}243\]

OpenStudy (anonymous):

Take 2log2041 common

OpenStudy (anonymous):

take out the value of log 2041

OpenStudy (anonymous):

This question is only possible by using logs

OpenStudy (anonymous):

\[ 2 n \log (2014)=(n+2) \log (243) \\ 2 n \log (2014)-n \log (243)=2 \log (243)\\ n (2 \log (2014)-\log (243))=2 \log (243)\\ n=\frac{2 \log (243)}{2 \log (2014)-\log (243)}=1.12995 \]

OpenStudy (anonymous):

then you do \[\frac{\log_{}2041}{\log_{}243} = \frac{n+2}{2n}\]

OpenStudy (anonymous):

then 2.775n = n+2, and then you get n as what i got above :P

OpenStudy (anonymous):

@tanvidais13 did you see how I did it?

OpenStudy (anonymous):

ok thnks

OpenStudy (anonymous):

yupss, i did, it's just i'd typed the whole thing out before, and then forgot to post it :P and then posted in 10 years later. and your method seems fin too :D

OpenStudy (anonymous):

*fine.

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