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OpenStudy (anonymous):
Question?
OpenStudy (anonymous):
they are typing
OpenStudy (superhelp101):
Ln2-ln(3x+2)=1
OpenStudy (anonymous):
mhmmm
OpenStudy (anonymous):
whats L and N for or are they just normal variables
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OpenStudy (superhelp101):
No sorry I meant natural logs
OpenStudy (superhelp101):
I have to get a natural log on both sides of the equation although I forgot how to do that
OpenStudy (anonymous):
ah ok
OpenStudy (anonymous):
ignore that
OpenStudy (superhelp101):
? do you know how I could get the logs on both sides and btw the answer is 4.125 well at least that is what my teacher got.
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OpenStudy (michele_laino):
please note that if I apply the property of the logarithms with same base, I get:
\[\ln2-\ln(3x+1)=\ln \left( \frac{ 2 }{ 3x+1 } \right)\]
and if I apply the definition of logarithm I get:
\[1=\ln e\]
OpenStudy (superhelp101):
I mean 4.214
OpenStudy (superhelp101):
ohhhh I see
OpenStudy (superhelp101):
@Michele_Laino what do I do after applying logs on both sides?
OpenStudy (michele_laino):
you have to equate both numbers, namely, from:
\[\ln \left( \frac{ 2 }{ 3x+1 } \right)=\ln e\]
we can write:
\[\frac{ 2 }{ 3x+1 }=e\]
so?
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OpenStudy (superhelp101):
would I multiply both of the sides by 3x+1 ?
OpenStudy (superhelp101):
nvm I got how to solve it!
thanks for all who came on the question and helped :)
OpenStudy (michele_laino):
Sorry I was at dinner
please multiply both sides by 3x+1