Posted by **Josh** on Sunday, March 16, 2014 at 3:54pm.

Use implicit diff. to find dy/dx of each of the following. In the following x,y and (a) are all variables. Show step by step please! Thank you!

1) y^2 = x^2+a^2

2) y^2+ay = x^2+ax+a^2

- Calculus Help Please!!! -
**Damon**, Sunday, March 16, 2014 at 4:02pm
2 y dy/dx = 2 x + 2 a da/dx

y dy/dx = (x+a da/dx)

dy/dx = (x + a da/dx)/y

or

dy/dx = (x + a da/dx)/(x^2+a^2)^.5

---------------------------------

2 y dy/dx + a dy/dx + y da/dx = 2 x^2 + a + x da/dx + 2 a da/dx

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

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

- Calculus Help Please!!! -
**bobpursley**, Sunday, March 16, 2014 at 4:58pm
I suspect in each, a is a constant, so da/dx=0

- Calculus Help Please!!! -
**Damon**, Sunday, March 16, 2014 at 5:38pm
I figured the same but he said specifically that a was variable.

- Calculus Help Please!!! -
**Josh**, Sunday, March 16, 2014 at 6:01pm
My answers were like these

1)

2yy'=2x+2a

y'=2x+2a/2y

2)

2yy'+ay'+y=2x+a+x+2a-y

2yy'+ay'=3x+3a-y

y'(2y+a)=3x+3a-y

y'=3x+3a-y/2y+a

And my teacher said I made mistakes with my answers but I couldn't figure out.

## Answer This Question

## Related Questions

- Physics - An arrow is shot straight up from the edge of a cliff with an initial ...
- calculus - Use logarithmic differentiation to find the following derivative: y=(...
- Physics - I'm trying to rearange this 0 = Xo + 2^-1 a t^2 for t I've been told ...
- Calculus - Solve the IVP {y'=-(sinx)y + xexp(cosx) y(0) = 1 Please show me step ...
- pre algebra - please show me step by step how to solve the following equation -...
- Calculus - Sketch a graph of a function f(x) that is differentiable and that ...
- CALCULUS HELP - Find the derivative of the following function showing your work ...
- Chemistry. - Caculate the wavelength of light emitted when each of the ...
- math/algebra - solve each of the following systems by substitution. 16) 5x -2y...
- Calculus - Find dy/dt. y=cos^4(pi(t)-20) If you could please show step-by-step, ...

More Related Questions