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Home Q & A Board Science-Related Homework Help Mathematics
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wrote...
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11 years ago
find dx/dy of x^2+y^2+3xy+9

Thanks, any help is appreciated!
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wrote...
#1
11 years ago
This is a bit strange. Is there supposed to be an equal sign anywhere, and are we finding x' or y' ? I've attached a lesson our teacher gave to us, but report back with the answer to my question Sad Dummy
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Biology - The only science where multiplication and division mean the same thing.
wrote...
#2
Valued Member
11 years ago
dx/dy of x^2+y^2+3xy+9
it is
dx/dy=2x.dx/dy + 2y + 3x + 3y.dx/dy
isolate dx/dy by making it subject of the equation.
you will get your answer
just look at it like any other normal implicit differentiation, except that it is dx/dy,  not dy/dx
if that is why you were confused.
I don't feel like riding until everything blurs.

Ask Me Maths Questions
wrote...
#3
11 years ago
Foadbear -- so should an equal sign be there? I'm so confused.
Biology - The only science where multiplication and division mean the same thing.
wrote...
#4
Valued Member
11 years ago
yeah I get it savio
it is just a function so you can put f(y) =  the function that is given since we have to find dx/dy
dont get confused, it is just like any other function you have differentiated
I don't feel like riding until everything blurs.

Ask Me Maths Questions
wrote...
#5
11 years ago
Quote from: foadbear (11 years ago)
yeah I get it savio
it is just a function so you can put f(y) =  the function that is given since we have to find dx/dy
dont get confused, it is just like any other function you have differentiated

That little bit you said clears up everything for me, thx.
Biology - The only science where multiplication and division mean the same thing.
wrote...
#6
Valued Member
11 years ago
Quote from: savio (11 years ago)
Quote from: foadbear (11 years ago)
yeah I get it savio
it is just a function so you can put f(y) =  the function that is given since we have to find dx/dy
dont get confused, it is just like any other function you have differentiated
anytime bud, keep up the good work

That little bit you said clears up everything for me, thx.
I don't feel like riding until everything blurs.

Ask Me Maths Questions
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