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Calculus1 19 Online
OpenStudy (anonymous):

find the...

OpenStudy (anonymous):

The what?

OpenStudy (anonymous):

\[\lim_{x \rightarrow 0}(\sqrt{6+x}-\sqrt{6})/x\]

OpenStudy (anonymous):

oh dang what grade is this?

OpenStudy (anonymous):

pre-calc / calc

OpenStudy (astrophysics):

Multiply by the conjugate.

OpenStudy (anonymous):

most take it as a junior or senior i think

OpenStudy (anonymous):

..............im in 8th grade..this looks like collage hahaha

OpenStudy (anonymous):

yeah i know to multiply by the conjugate but i'm having trouble simplifying it

OpenStudy (astrophysics):

Sure, show me where you're having trouble and we can fix it.

OpenStudy (sleepyjess):

I'm taking precal as a sophomore...

OpenStudy (astrophysics):

That's not how it works @sleepyjess

OpenStudy (sleepyjess):

oh, whoops, that's what I was taught

OpenStudy (anonymous):

\[(6+x-6)/(x \sqrt{6+x}+x \sqrt{6})\]

OpenStudy (anonymous):

i think that's how its supposed to go

OpenStudy (astrophysics):

\[\lim_{x \rightarrow 0} \frac{ (\sqrt{6+x}-6) }{ x } \implies \lim_{x \rightarrow 0} \frac{ \left( \sqrt{6+x}-6 \right) }{ x } \times \frac{ \sqrt{6+x}+6 }{ \sqrt{6+x}+6 }\] right?

OpenStudy (anonymous):

square root of 6 too on the top

OpenStudy (astrophysics):

Ah ok, yeah that looks good

OpenStudy (astrophysics):

So what can we do with the numerator :P

OpenStudy (acxbox22):

@sleepyjess are we bragging now? lololol jkjk

OpenStudy (anonymous):

well i suppose the 6's cancel

OpenStudy (anonymous):

so \[1/(\sqrt{6+x}+\sqrt{x})\] ?

OpenStudy (anonymous):

*\[\sqrt{6}\]

OpenStudy (astrophysics):

You still have x up there

OpenStudy (astrophysics):

So we cancel it out

OpenStudy (astrophysics):

Oh wait I see you did that!

OpenStudy (astrophysics):

Looks good :)

OpenStudy (anonymous):

so i would leave it like that?

OpenStudy (astrophysics):

Yeah you can take the limit now

OpenStudy (astrophysics):

x->0

OpenStudy (anonymous):

\[1/(2\sqrt{6})\] ?

OpenStudy (astrophysics):

Looks good

OpenStudy (anonymous):

alright thanks :)

OpenStudy (astrophysics):

Np!

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