anonymous
  • anonymous
Differentiate the function?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Not sure how to, I know about f(x+h).... The function is \(\ \Huge y=x^{\frac{-2}{5}} \).
baldymcgee6
  • baldymcgee6
Do you want to use the definition of a derivative, or differentiating rules?
anonymous
  • anonymous
|dw:1351143271652:dw|

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anonymous
  • anonymous
I don't know, honestly I don't know because we got this assignment after a test without explanation
baldymcgee6
  • baldymcgee6
Have you heard of the power rule?
anonymous
  • anonymous
No...
baldymcgee6
  • baldymcgee6
Does this look familiar?|dw:1351143348273:dw|
anonymous
  • anonymous
Yup!
baldymcgee6
  • baldymcgee6
ok... good!
baldymcgee6
  • baldymcgee6
can you set it up?
anonymous
  • anonymous
Hmm, just plug (x+h) for x?
anonymous
  • anonymous
Where does the power rule come in?
baldymcgee6
  • baldymcgee6
Basically.. forget the power rule. you will learn that later. For now you must use this method :D ... But once you learn the power rule, you will be able to differentiate that in 5 seconds.
baldymcgee6
  • baldymcgee6
|dw:1351143586995:dw|
anonymous
  • anonymous
Okay, because the text explains that in this chapter but I don't understand it
baldymcgee6
  • baldymcgee6
oh.. well then maybe you want to learn it?? because this method will take ALOT longer and is ALOT more work.. :0 Power rule is pretty simple to grasp... want me to explain?
anonymous
  • anonymous
Yes please!!
baldymcgee6
  • baldymcgee6
ok :)
baldymcgee6
  • baldymcgee6
|dw:1351143786848:dw|
anonymous
  • anonymous
Is the d/dx the same as f'(x)?
baldymcgee6
  • baldymcgee6
very good question, there is a little bit of history to this... basically two guys were inventing calculus near the same time, so lots of different notations came about. These all mean the same thing: |dw:1351144085607:dw|
anonymous
  • anonymous
Oh okay! It just looks more complicated haha
baldymcgee6
  • baldymcgee6
Back to our question... |dw:1351144249816:dw|
baldymcgee6
  • baldymcgee6
It does look more intimidating, but you will get used to it :)
anonymous
  • anonymous
So basically you have to memorize these rules?
baldymcgee6
  • baldymcgee6
haha, you will have to yes... But it will become second nature. For this rule, just drop the exponent and minus one.
anonymous
  • anonymous
You explained it much better than the 2 paragraphs of math jargon my text has! :D
baldymcgee6
  • baldymcgee6
|dw:1351144716613:dw|
anonymous
  • anonymous
I got -7/5 not -3/5...
baldymcgee6
  • baldymcgee6
Sorry.. i'm tired.. and you're right. :)
baldymcgee6
  • baldymcgee6
|dw:1351145072249:dw|
anonymous
  • anonymous
Okay... Thanks for all your help @baldymcgee6 ! I appreciate it greatly!! :D
anonymous
  • anonymous
After all, not everyone takes the time to explain the concept!

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