Calculus question
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Gold Member Username: BlainewPost Number: 2797 Registered: Nov-05 | what is dy/dx of x^2+y^2=square root of 7 dy/dx of y^2 is 2x, but what is dy/dx of y^2??? and how do you solve this whole thing |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1652 Registered: Mar-07 | if I remember correctly 2x + 2y(dy/dx) = (1/2)7^-(1/2) or (7/2)^-(1/2) but it's been a while and that may be completely wrong |
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Gold Member Username: BlainewPost Number: 2799 Registered: Nov-05 | nahhh haha thats wrong..kind of on the right track the regular rules of dy/dx only apply when x is your variable... when y is in there you do something different.. |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1655 Registered: Mar-07 | wish I had something to look at real quick, it would come back to me real quick, like riding a bike  lol can you post a pic of the problem? don't you have a book or something? |
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Gold Member Username: Livin_loudDo Work Fi Audio Post Number: 2155 Registered: Jan-06 | bet brad knows... |
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Platinum Member Username: Rovin4 10 Pioneer... Post Number: 12800 Registered: Jul-05 | man looking at that sh1t reminds me of school days - hated that sh1t ! .... gives me a migraine wtf will u ever ned to know that in life for ...unless u gonna become a teacher or engineer .........  |
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Silver Member Username: Fred_sanfordHuntsville, Alabama Usa Post Number: 103 Registered: Nov-07 | on the test just write "damnedifino" lol |
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Platinum Member Username: WingmanaliveA pic is worth 1000 posts!! Post Number: 12440 Registered: Jun-06 | LOL. Why post a calculus question in this forum? LOLOLOL. You're all smarter than me.  |
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New member Username: Letstalksound2Post Number: 5 Registered: Nov-06 | dy/dx is a synonym for f'(x) so I think it's just asking for the derivative of the whole thing... therefore... f(x) = x^2+y^2= 7^ .5 f'(x) = 2x + 2y = .5 7^ -.5 (x^.5 = x^1/2 = square root x) hope this helps, and it correct would be helpful to see the book and know what context the question is in, i.e. what type of derivatives your working on. Try Cramster, it has pretty much all the odd problems worked out for alot of calc textbooks Good Luck |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1679 Registered: Mar-07 | ^d@mn, I was wrong with the "2y(dy/dx)" but what Mike Jones posted has to be right again, it would helpful to see an example or the book |
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New member Username: Letstalksound2Post Number: 6 Registered: Nov-06 | who are you thieves ? |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1680 Registered: Mar-07 | can't tell you that |
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New member Username: Letstalksound2Post Number: 7 Registered: Nov-06 | My guess would be Justin, but I'm not sure. You obviously know me tho. |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1681 Registered: Mar-07 | I know a few Justins, but I'm not one of them |
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Gold Member Username: BlainewPost Number: 2800 Registered: Nov-05 | mike jones...thats wrong.. |
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Gold Member Username: BernymacCambodia Post Number: 3630 Registered: Sep-04 | Now I'm mad that I forgot how to do it. Now I have to go home and look it up :\. |
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Gold Member Username: BernymacCambodia Post Number: 3631 Registered: Sep-04 | Write the whole equation as you see it in the book and I can probaly answer it :\. |
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Gold Member Username: Nyyfan13Fi SSD USA Post Number: 7909 Registered: Jul-06 | i have that exact problem in my notebook but I cant find the notebook.... |
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New member Username: Letstalksound2Post Number: 8 Registered: Nov-06 | sorry, best guess with the info you gave me |
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Gold Member Username: Big_edge_headMilwaukee, Wisconsin USA Post Number: 1129 Registered: Mar-07 | Makes me glad i dont have math anymore. whew. |
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Gold Member Username: BlainewPost Number: 2801 Registered: Nov-05 | i figured it out |
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Gold Member Username: DrivingrecklessDD 9515f, 148.2 db Mov... Post Number: 5091 Registered: Apr-06 | i took calc in high school. worst time i ever had in High school. cant wait to take it in college  |
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Silver Member Username: Drant19DUB-C, TX Post Number: 191 Registered: Aug-07 | i dropped calculus....twice lol |
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New member Username: Letstalksound2Post Number: 9 Registered: Nov-06 | what was the answer ? |
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Gold Member Username: BlainewPost Number: 2802 Registered: Nov-05 | it equals -x/y if anyone wants an explanation i will be glad to tell |
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Silver Member Username: MendonmafiaUSA Post Number: 669 Registered: Aug-06 | i would like to have an explination. i am a junior materials science engineering student and i have basically forgotted all my calculus except like basic integrals like the integral or 2x^3 and sh1t like that, because we get to use tables hahahaha. |
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Gold Member Username: BlainewPost Number: 2805 Registered: Nov-05 | its really complicated to explain. And I am on my iPod right now so when I get to a computer I will explain the answer |
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Platinum Member Username: Rovin4 10 Pioneer... Post Number: 12815 Registered: Jul-05 | this thread will prove who r the geeks on this forum ...... |
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Silver Member Username: MendonmafiaUSA Post Number: 673 Registered: Aug-06 | nothing wrong with being geeky. unless being rich is a bad thing, i should be making 6 figures once i get my masters (wait to see my system then!!). and whatever school i go to is going to pay me to do my masters lol. |
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Gold Member Username: JtownTeam Revolution, Texas Post Number: 1707 Registered: Mar-07 | what can I say? I like calculus |
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