## Study23 Group Title Differentiate the function? one year ago one year ago

1. Study23 Group Title

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

2. baldymcgee6 Group Title

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

3. soty2013 Group Title

|dw:1351143271652:dw|

4. Study23 Group Title

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

5. baldymcgee6 Group Title

Have you heard of the power rule?

6. Study23 Group Title

No...

7. baldymcgee6 Group Title

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

8. Study23 Group Title

Yup!

9. baldymcgee6 Group Title

ok... good!

10. baldymcgee6 Group Title

can you set it up?

11. Study23 Group Title

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

12. Study23 Group Title

Where does the power rule come in?

13. baldymcgee6 Group Title

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.

14. baldymcgee6 Group Title

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15. Study23 Group Title

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

16. baldymcgee6 Group Title

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?

17. Study23 Group Title

18. baldymcgee6 Group Title

ok :)

19. baldymcgee6 Group Title

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20. Study23 Group Title

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

21. baldymcgee6 Group Title

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|

22. Study23 Group Title

Oh okay! It just looks more complicated haha

23. baldymcgee6 Group Title

Back to our question... |dw:1351144249816:dw|

24. baldymcgee6 Group Title

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

25. Study23 Group Title

So basically you have to memorize these rules?

26. baldymcgee6 Group Title

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

27. Study23 Group Title

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

28. baldymcgee6 Group Title

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29. Study23 Group Title

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

30. baldymcgee6 Group Title

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

31. baldymcgee6 Group Title

|dw:1351145072249:dw|

32. Study23 Group Title

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

33. Study23 Group Title

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