nincompoop
  • nincompoop
use the definition of derivative to find f'(x)
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
nincompoop
  • nincompoop
\[f(x)=\sqrt{(x-4)}\]
myininaya
  • myininaya
Do you need help pluggin in or multiply by the the top's conjugate?
swissgirl
  • swissgirl
hmmm do you mean \[ \frac{f(a+h)-f(a)}{(a+h)-a}\]

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nincompoop
  • nincompoop
that is the definition of derivative @swissgirl YES :D
nincompoop
  • nincompoop
so you're left with \[f'(x)=\frac{ \sqrt }{ h }\]
swissgirl
  • swissgirl
\[f'(x)=\frac{ \sqrt{(x+h)-4}-\sqrt{x-4}}{h}\]
nincompoop
  • nincompoop
\[f'(x)=\lim_{h \rightarrow 0}\frac{ \sqrt }{ ? }\]
nincompoop
  • nincompoop
WTFFFFFF
shamil98
  • shamil98
LOL
shamil98
  • shamil98
That latex fail
nincompoop
  • nincompoop
why is not going through?
shamil98
  • shamil98
oh gratz on 90 ss nin
swissgirl
  • swissgirl
Just btw my definition is not complete. This is the correct definition \[ \lim_{h \to 0}\frac{f(a+h)-f(a)}{(a+h)-a}\]
nincompoop
  • nincompoop
\[f'(x)=\lim_{h \rightarrow 0} \frac{ \sqrt{(x+h)-4} -(\sqrt{x-4})} { h }\]
nincompoop
  • nincompoop
finally!!!!!!!!
shamil98
  • shamil98
f(x) = (x-4)^1/2 \[f'(x)= (\frac{ x-4 }{ 2 })^{\frac{ -1 }{ 2 }}\]
nincompoop
  • nincompoop
I didn't want to pick on you, @swissgirl LAUGHING OUT LOUD but yes. without the limit would be the MVT or the mean value theorem
shamil98
  • shamil98
o.o
nincompoop
  • nincompoop
no @shamil98 you've changed the entire thing by changing h = 2
nincompoop
  • nincompoop
h -> 0
nincompoop
  • nincompoop
you must be using a Plutonian Rule
swissgirl
  • swissgirl
Ok so basically the next step would be to multiply by the conjugate. Gonna write it out and scan it in cuz it will take me forever to type it in latex
nincompoop
  • nincompoop
I tried, omg that thing takes forever using the equation tool bar
nincompoop
  • nincompoop
you know at a glance, I thought it is not differentiable because it involves imaginary number and when that is the case, there's no limit with real number, hence no derivatives.
swissgirl
  • swissgirl
no there is a derivative just rewriting it.
swissgirl
  • swissgirl
1 Attachment
nincompoop
  • nincompoop
i know that >.<
nincompoop
  • nincompoop
was showing @shamil98
nincompoop
  • nincompoop
how'd you scan that so quickly?
swissgirl
  • swissgirl
ummm it takes no longer than a half a second to scan
nincompoop
  • nincompoop
omg my scanner takes like a light year to scan a page
swissgirl
  • swissgirl
I have an issue I cant draw straight lines -_-
nincompoop
  • nincompoop
ruler usually solves that problem
swissgirl
  • swissgirl
lol thats what I usually hafta us
nincompoop
  • nincompoop
it is less of a technology than a scanner
swissgirl
  • swissgirl
hahahaha
nincompoop
  • nincompoop
@shamil98 yo review this LAUGHING OUT LOUD so you can skip 2 years of college in math
swissgirl
  • swissgirl
Ya I am great at bargaining and I managed to still get warranty coverage after the warranty was over for a year and I complained that the scanning was slow so they sent me a newer model printer which works awesome
nincompoop
  • nincompoop
can you send me an extra scanner then? I want the fujitsu desktop scanner. the brother machine I have is uber slow
swissgirl
  • swissgirl
ohhh I kept it and gave it to my bros ato destroy
nincompoop
  • nincompoop
bought it for 99 bucks just to have something to scan all my lab and experiment draft crap
swissgirl
  • swissgirl
ummm I have hp
swissgirl
  • swissgirl
mine was $150 I think
nincompoop
  • nincompoop
yo I saw the HP one, it's "touch" technology, but it's bulky and it gets smudgie
swissgirl
  • swissgirl
But I gotta scan in all my work every week so it was a necessity
swissgirl
  • swissgirl
ya the touch aint bothersome But have not noticed it smudgy but then again I rarely print I usually scan
nincompoop
  • nincompoop
so do you think you can get the fujitsu desktop scanner? although it's not for high-paper scanning, it's fast and very small
swissgirl
  • swissgirl
for you or for me???
swissgirl
  • swissgirl
Not gonna waste my bargaining skills on you :P
nincompoop
  • nincompoop
http://www.fujitsu.com/us/services/computing/peripherals/scanners/scansnap/scansnap-iX500-deluxe-bundle.html
nincompoop
  • nincompoop
you're mean ... just mean mean mean cheese
swissgirl
  • swissgirl
OMG its expensive -_-
swissgirl
  • swissgirl
Totally not on my budget
nincompoop
  • nincompoop
it's actually cheaper now. it used to be around 900
swissgirl
  • swissgirl
ya still dont excite me
nincompoop
  • nincompoop
I've been waiting for that crap to be like 200 bucks so I can buy it, but they kept discontinuing the older models
swissgirl
  • swissgirl
Smart guys
nincompoop
  • nincompoop
blame the canadians ....
swissgirl
  • swissgirl
Did ya hear ma mayor is a crack head :D
nincompoop
  • nincompoop
it's fujitfrichinsu, it should be Japan
nincompoop
  • nincompoop
your mayor? or the re-elected Christie of NJ?
nincompoop
  • nincompoop
wait he's a governor LAUGHING OUT LOUD
swissgirl
  • swissgirl
Hey I dont live in NJ remembah
nincompoop
  • nincompoop
I would have bashed him for being unhealthy fat slob and use that against him he neglects his own health and that is why he doesn't care about other people's health, which is the reason why he keeps cutting the university hospital's budgets
swissgirl
  • swissgirl
lol ohhh I forgot u live in NJ
nincompoop
  • nincompoop
I am a New Yorker... LAUGHING OUT LOUD
swissgirl
  • swissgirl
But u do live in NJ or at least at one point u did
swissgirl
  • swissgirl
idk I only have one place of residence
nincompoop
  • nincompoop
don't you live in like NJ, NY and Canada?
swissgirl
  • swissgirl
I visit those places but I only live in canada. I may be coming into NJ in 2 weeks -_-
nincompoop
  • nincompoop
laughing out loud
swissgirl
  • swissgirl
Its not funny!!! idk i may just stay at home alone. Seriously dont wanna head out there

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