Study23
Differentiate the function?
Delete
Share
This Question is Closed
Study23
Best Response
You've already chosen the best response.
0
Not sure how to, I know about f(x+h).... The function is \(\ \Huge y=x^{\frac{-2}{5}} \).
baldymcgee6
Best Response
You've already chosen the best response.
2
Do you want to use the definition of a derivative, or differentiating rules?
soty2013
Best Response
You've already chosen the best response.
0
|dw:1351143271652:dw|
Study23
Best Response
You've already chosen the best response.
0
I don't know, honestly I don't know because we got this assignment after a test without explanation
baldymcgee6
Best Response
You've already chosen the best response.
2
Have you heard of the power rule?
Study23
Best Response
You've already chosen the best response.
0
No...
baldymcgee6
Best Response
You've already chosen the best response.
2
Does this look familiar?|dw:1351143348273:dw|
Study23
Best Response
You've already chosen the best response.
0
Yup!
baldymcgee6
Best Response
You've already chosen the best response.
2
ok... good!
baldymcgee6
Best Response
You've already chosen the best response.
2
can you set it up?
Study23
Best Response
You've already chosen the best response.
0
Hmm, just plug (x+h) for x?
Study23
Best Response
You've already chosen the best response.
0
Where does the power rule come in?
baldymcgee6
Best Response
You've already chosen the best response.
2
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
Best Response
You've already chosen the best response.
2
|dw:1351143586995:dw|
Study23
Best Response
You've already chosen the best response.
0
Okay, because the text explains that in this chapter but I don't understand it
baldymcgee6
Best Response
You've already chosen the best response.
2
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?
Study23
Best Response
You've already chosen the best response.
0
Yes please!!
baldymcgee6
Best Response
You've already chosen the best response.
2
ok :)
baldymcgee6
Best Response
You've already chosen the best response.
2
|dw:1351143786848:dw|
Study23
Best Response
You've already chosen the best response.
0
Is the d/dx the same as f'(x)?
baldymcgee6
Best Response
You've already chosen the best response.
2
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|
Study23
Best Response
You've already chosen the best response.
0
Oh okay! It just looks more complicated haha
baldymcgee6
Best Response
You've already chosen the best response.
2
Back to our question...
|dw:1351144249816:dw|
baldymcgee6
Best Response
You've already chosen the best response.
2
It does look more intimidating, but you will get used to it :)
Study23
Best Response
You've already chosen the best response.
0
So basically you have to memorize these rules?
baldymcgee6
Best Response
You've already chosen the best response.
2
haha, you will have to yes... But it will become second nature. For this rule, just drop the exponent and minus one.
Study23
Best Response
You've already chosen the best response.
0
You explained it much better than the 2 paragraphs of math jargon my text has! :D
baldymcgee6
Best Response
You've already chosen the best response.
2
|dw:1351144716613:dw|
Study23
Best Response
You've already chosen the best response.
0
I got -7/5 not -3/5...
baldymcgee6
Best Response
You've already chosen the best response.
2
Sorry.. i'm tired.. and you're right. :)
baldymcgee6
Best Response
You've already chosen the best response.
2
|dw:1351145072249:dw|
Study23
Best Response
You've already chosen the best response.
0
Okay... Thanks for all your help @baldymcgee6 ! I appreciate it greatly!! :D
Study23
Best Response
You've already chosen the best response.
0
After all, not everyone takes the time to explain the concept!