- #1
momogiri
- 52
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Question:
Find dy/dx by implicit differentiation
4x^2 + 3xy - y^2 = 6
Attempt:
Ok, just a forewarning that I suck at differentiations, limits, what-not, so..
Following my textbook, it says I should Differentiate both sides of the equation
So...
(d/dx)(4x^2 + 3xy - y^2) = (d/dx)(6)
(d/dx)(6) = 0, so I have to solve the derivatives of the other side..
Now, this is the part that I'm unsure about, so please guide me here:
(d/dx)(4x^2) = 8x right? Since I bring down the two and subtract 1
Ok, so.. (d/dx)(3xy), using the chain rule which is f(g(x)) = f'(g(x))*g'(x), I figured:
y(...) is the outer function and 3x is the inner funtion
thus, making it (y(3x))' * (3x)' = (dy/dx)(3x) * 1?
Can someone please clarify that last part I wrote for me? Also, it'd be great if someone can clarify the difference and meaning between dy/dx, d/dx, and d/dy..
Then I'll try and move on XD
Please and thank you for your time XD
PS: I do realize I haven't got through the whole question, but I will, once the above is clarified as correct, etc. :D
Find dy/dx by implicit differentiation
4x^2 + 3xy - y^2 = 6
Attempt:
Ok, just a forewarning that I suck at differentiations, limits, what-not, so..
Following my textbook, it says I should Differentiate both sides of the equation
So...
(d/dx)(4x^2 + 3xy - y^2) = (d/dx)(6)
(d/dx)(6) = 0, so I have to solve the derivatives of the other side..
Now, this is the part that I'm unsure about, so please guide me here:
(d/dx)(4x^2) = 8x right? Since I bring down the two and subtract 1
Ok, so.. (d/dx)(3xy), using the chain rule which is f(g(x)) = f'(g(x))*g'(x), I figured:
y(...) is the outer function and 3x is the inner funtion
thus, making it (y(3x))' * (3x)' = (dy/dx)(3x) * 1?
Can someone please clarify that last part I wrote for me? Also, it'd be great if someone can clarify the difference and meaning between dy/dx, d/dx, and d/dy..
Then I'll try and move on XD
Please and thank you for your time XD
PS: I do realize I haven't got through the whole question, but I will, once the above is clarified as correct, etc. :D