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Mathematics 9 Online
OpenStudy (dls):

Limits question [Challenge]

OpenStudy (dls):

\[\LARGE \lim_{x \rightarrow 0} \frac{(1+x)^\frac{1}{x} -e}{x}\]

OpenStudy (dls):

@yrelhan4 @shubhamsrg

OpenStudy (shubhamsrg):

* :)

OpenStudy (dls):

first time in life :O

Parth (parthkohli):

Taylor Series expansion?

OpenStudy (dls):

Use whatever you want.

Parth (parthkohli):

Ans 0?

OpenStudy (dls):

Nope

OpenStudy (experimentx):

Taylor series works

Parth (parthkohli):

Weird. The Taylor Series expansion is in the terms of \(e\) and \(x\). The first term is \(e\)

OpenStudy (dls):

Taylor series gives 0?

OpenStudy (experimentx):

gives -e/2 if you calculate correctly

Parth (parthkohli):

Oh wait! lol, yeah. I forgot to consider that -e/2 which had no \(x\)

OpenStudy (dls):

How about a different way rather than taylor series?

Parth (parthkohli):

Definition of derivative? :-|

OpenStudy (dls):

o.O

Parth (parthkohli):

I was just thinking how this might be the definition of a derivative in disguise.

OpenStudy (experimentx):

Binomial expansion might work ... but that's too long

Parth (parthkohli):

DLS Use whatever you want. 15 minutes ago DLS How about a different way rather than taylor series? 9 minutes ago

OpenStudy (dls):

You are right,still investigating for more methods,I wrote so to specify that you are not bound to any particular method,just asking if you know anything alternate :)

OpenStudy (experimentx):

L'hopital works

OpenStudy (experimentx):

http://www.wolframalpha.com/input/?i=Limit%5B%281+%2B+x%29%5E%281%2Fx%29+%281%2F%28x+%281+%2B+x%29%29+-+Log%5B1+%2B+x%5D%2Fx%5E2%29%2C+x+-%3E+0%5D after using L'hopital you get this expression. The first term tends to e .. if you again apply L'hopital on the second term, you will get -1/2

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