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Mathematics 8 Online
OpenStudy (anonymous):

ln e = ??

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

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

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

myininaya (myininaya):

\[e^x=8=> lne^x=\ln8 => xlne=\ln8 => x(1)=\ln8 => x=\ln8\]

myininaya (myininaya):

i let your ? be x

OpenStudy (anonymous):

so would the answer be 2.08?

myininaya (myininaya):

ln8

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: \[ln(e) = ln(e^1) = 1\]

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