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OpenStudy (anonymous):
1
myininaya (myininaya):
yep yep
OpenStudy (anonymous):
How is it 1?
OpenStudy (anonymous):
it's a theorem, Ln(e) = 1
myininaya (myininaya):
its a property
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OpenStudy (anonymous):
LN(e) = 1, LN(1) = 0
OpenStudy (anonymous):
Okay :) Thank youuuu!!!
OpenStudy (anonymous):
I have another question...
OpenStudy (anonymous):
\[Log_b b=1\]
Since ln is \[\log_e\]
\[Log_e e=1\]
OpenStudy (anonymous):
What is e^? =8
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myininaya (myininaya):
oh yeah let y=lne
so we can write \[y=\log_e(e)\]
and an exponential from we can write
\[e^y=e\]
and \[e=e^1\]
\[e^y=e^1\]
so y=1
but we also said y=lne
so lne must equal 1
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OpenStudy (anonymous):
So ln8 is the answer?
myininaya (myininaya):
do you not understand how i solved for x?
i took natural log of both sides first
one of my properties say i can write lne^x as xlne
and we know lne=1 we proved it above
so we got x=ln8
whats the question
OpenStudy (anonymous):
I understand now, thank you :)
OpenStudy (anonymous):
Natural log is the inverse of the exponential function:
\[ln(e) = ln(e^1) = 1\]