Differentiate the function?

- anonymous

Differentiate the function?

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- anonymous

Not sure how to, I know about f(x+h).... The function is \(\ \Huge y=x^{\frac{-2}{5}} \).

- baldymcgee6

Do you want to use the definition of a derivative, or differentiating rules?

- anonymous

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## More answers

- anonymous

I don't know, honestly I don't know because we got this assignment after a test without explanation

- baldymcgee6

Have you heard of the power rule?

- anonymous

No...

- baldymcgee6

Does this look familiar?|dw:1351143348273:dw|

- anonymous

Yup!

- baldymcgee6

ok... good!

- baldymcgee6

can you set it up?

- anonymous

Hmm, just plug (x+h) for x?

- anonymous

Where does the power rule come in?

- 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

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- anonymous

Okay, because the text explains that in this chapter but I don't understand it

- 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

Yes please!!

- baldymcgee6

ok :)

- baldymcgee6

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- anonymous

Is the d/dx the same as f'(x)?

- 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:
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- anonymous

Oh okay! It just looks more complicated haha

- baldymcgee6

Back to our question...
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- baldymcgee6

It does look more intimidating, but you will get used to it :)

- anonymous

So basically you have to memorize these rules?

- baldymcgee6

haha, you will have to yes... But it will become second nature. For this rule, just drop the exponent and minus one.

- anonymous

You explained it much better than the 2 paragraphs of math jargon my text has! :D

- baldymcgee6

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- anonymous

I got -7/5 not -3/5...

- baldymcgee6

Sorry.. i'm tired.. and you're right. :)

- baldymcgee6

|dw:1351145072249:dw|

- anonymous

Okay... Thanks for all your help @baldymcgee6 ! I appreciate it greatly!! :D

- anonymous

After all, not everyone takes the time to explain the concept!

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