Thursday

April 2, 2015

April 2, 2015

Posted by **theo** on Sunday, July 4, 2010 at 6:14pm.

(x+y)/(x-y)= x^2 + y^2; dx/dt = 12, x = 1, y = 0

- calculus -
**bobpursley**, Sunday, July 4, 2010 at 6:20pmmultipy both sides by (x-y)

x+y=x^3 -yx^2-xy^2-y^3 check that.

dx/dt+dy/dt= 3x^2 dx/dt-2yx dx/dt-x^2dy/dt-y^2dx/dt-3y^2 dy/dt

gather terms....

dx/dt(1-3x^2+2yx+3y^2)=dy/dt (-1-x^2-3y^2)

check that carefully, it is easy to make an error in sign.

solve for dy/dt

**Answer this Question**

**Related Questions**

calculus - Calculate dy/dt using the given information. (x+y)/(x-y)= x^2 + y^2; ...

calculus - Calculate dy/dt using the given information. xy + x = 12; dx/dt = -3...

chemistry - The acid dissociation constant, Ka, for this reaction is given by ...

math - Calculate dy/dt using the given information. y = (Ãx+1) =12; dx/dt = 8, x...

math - Calculate dy/dt using the given information. (yÃx+1) =12; dx/dt = 8, x = ...

calculus - Calculate the left Riemann sum for the given function over the given ...

Probability - Calculate the (modeled) probability P(E) using the given ...

managerial economics - 1. Calculate the demand elasticity of demand ( by using ...

Physics - The moment of inertia of an object depends on the shape of the object...

chemistry - The normal boiling point of ethanol is 78.5C. Using the following ...