Posted by **Skye** on Monday, February 4, 2008 at 6:40pm.

Find dx/dy by implicit differentiation

x^2y+y^2x

P.S: It's calculus

- Math -
**drwls**, Monday, February 4, 2008 at 6:53pm
Differentiate with respect to y, recognizing that x is a function of y.

You cannot "find" dx/dy unless you write an equation. You have only written a formula for a function g(x,y).

If x^2*y + y^2*x = C (any constant), then

x^2 + y*2x*dx/dy + 2yx + y^2 dx/dy = 0

dx/dy(y^2x + y^2) = -x^2 -2yx

dx/dy = -x(x-2y)/[y^2(1+x)]

- Math -
**Damon**, Monday, February 4, 2008 at 6:54pm
I think you want this equal to a constant if you want a solutionyou want dx/dy so differentiate wrt y

x^2 + y 2 x dx/dy+ y^2 dx/dy + x 2 y

= x^2 + 2 xy dx/dy + y^2 dx/dy + 2 x y

= dx/dy (2xy + y^2) + x^2 + 2xy

now if the right hand were a constant, then that = 0 so

dx/dy = -(x^2+2xy)/(y^2+2xy)

- Math -
**Anonymous**, Wednesday, February 6, 2008 at 4:07am
y = x^2y+y^2x

dy/dx = 2y X^2y-1 + 2x Y^2x-1

## Answer this Question

## Related Questions

- Calculus 1 - implicit differentiation - I do not understand implicit ...
- Calculus 1 - implicit differentiation - I do not understand implicit ...
- Implicit differentiation calculus - PLEASE HELP , I DON'T UNDERSTAND find dy/dx ...
- Math - Calculus Question. - hey can someone explain to me the relationship ...
- Calculus - How do you use imlicit differentiation to differentiate e^(xy)? I ...
- Calculus [Implicit Differentiation] - If √x+√y=10 and y(16)=36, find...
- Calculus: implicit differentiation - Find dy/dx by implicit differentiation 1. x...
- calculus - Given y^4 -x^4=16 find and simplify d2y/dx2 using implicit ...
- calculus; implicit differentiation - Use implicit differentiation to find the ...
- Calculus 1 Implicit differentiation - Help please help me understand what i am ...

More Related Questions