1018
  • 1018
find df/dx and df/dy :
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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1018
  • 1018
\[\sqrt{4x ^{2} + 3y ^{2}}\]
welshfella
  • welshfella
first simplify this a bit = [ (4x^2 + 3y^2)^½]^3 = (4x^2 + 3y^2)^(3/2)
welshfella
  • welshfella
now you use the chain rule

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welshfella
  • welshfella
oh!! or is this partial differentiation??
1018
  • 1018
wait, sorry, the derivatives are to be solved separately. like dx first then dy haha sorry
1018
  • 1018
cause i saw that you should treat y as a constant etc etc for dx and vice versa for dy...
welshfella
  • welshfella
yes - oh - its been a long time i'm struggling to remember this stuff...
1018
  • 1018
haha, im just studying it right now and already struggling. lol. so, am i right?
welshfella
  • welshfella
yes - you have the general idea but i'm a bit hazy on it to be honest
1018
  • 1018
im just wondering if y is to be constant, so finding dx would just be sqrt(4x^2) dx ?
1018
  • 1018
the radical is confusing me i might get it wrong
welshfella
  • welshfella
i'm sure some of the other guys will be more familiar with it than i am.
welshfella
  • welshfella
well chage the radical to an exponent as i have done
1018
  • 1018
1/2 right?
1018
  • 1018
ok i think i got it from here. haha. thanks!
welshfella
  • welshfella
square root = ^(½) yes
welshfella
  • welshfella
yw

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