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Mathematics 10 Online
OpenStudy (anonymous):

Limits.

OpenStudy (anonymous):

Yes.

OpenStudy (anonymous):

Show that \[\lim_{x \rightarrow 0} \sin \frac{ 1 }{ x }\] does not exists .

OpenStudy (anonymous):

try taking the limit as x aproaches zero from the left and then the right and where that gets you

OpenStudy (anonymous):

it gives you sin of infinity...how do i solve that ..??

OpenStudy (anonymous):

for both of them

OpenStudy (anonymous):

yes one come out to be -lim of sin (infinity) and other is lim sin of infinity

OpenStudy (anonymous):

is that dash a negative sin

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

ok so the funciton is trending toward neg. infinity on the left and pos. infinity on the right

OpenStudy (anonymous):

actually sin of both....

OpenStudy (anonymous):

Ok then how about using L'Hopital's rule

OpenStudy (anonymous):

ok i'll try that way..

OpenStudy (anonymous):

Once you take the derivitive, try taking the limit from the left and right. If that does not work, I will try to look up some other tricks we can use

OpenStudy (anonymous):

it comes out to be more weird ...like cos of infinity and all..:/ ..please there should be an easy way out..

OpenStudy (anonymous):

as x goes to zero, 1/x goes to infinity, then let 1/x = u. sin(u) as u goes to infinity does not exist because the values oscillate between -1 and 1.

OpenStudy (anonymous):

so are you saying we cant determine the value ..

OpenStudy (anonymous):

the limit does not exist.

OpenStudy (anonymous):

|dw:1365356122302:dw| u is tending towards infinty not sinu ...:/

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