Calculus1
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OpenStudy (anonymous):
find the...
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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.
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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...
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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?
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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
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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!
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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):
\[1/(2\sqrt{6})\]
?
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OpenStudy (astrophysics):
Looks good
OpenStudy (anonymous):
alright thanks :)
OpenStudy (astrophysics):
Np!