anonymous
  • anonymous
Help with calculus please?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
If 2x2 + y2 = −2 then evaluate the second derivative of y with respect to x when x = 2 and y = 3.
anonymous
  • anonymous
I'll fan or medal or whatever, just stuck on this one question.
anonymous
  • anonymous
Do I find the second derivative, then plug in the values. Do I plug them in after differentiating once then differentiate again?

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tkhunny
  • tkhunny
Did you find the first derivative?
anonymous
  • anonymous
It's implicit derivative, so I'd find the derivative of both sides seperately, yeah? That'd be 2 y y'(x)+4 x = 0?
anonymous
  • anonymous
Am I wrong? Can someone help further?
tkhunny
  • tkhunny
2x2 + y2 = −2 4x + 2yy' = 0 Agreed. Now, the second derivative. You need only one things you didn't use before, the product rule. What are you going to do with 2yy'? You can solve for y', first. Sometimes that helps. Sometimes, that just makes it worse.
anonymous
  • anonymous
wait I think that was the wrong problem -2x/y rather?
anonymous
  • anonymous
Oh nvm
mathmale
  • mathmale
Please double check. Start over: type in the problem you want to discuss.

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