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April 19, 2014

April 19, 2014

Posted by **maggie** on Wednesday, March 7, 2012 at 11:06am.

a) f(x,y) = e^(-xy)

b) h,(u,v)= √(4-u^2 - v^2)

- calculus -
**maggie**, Wednesday, March 7, 2012 at 11:09amfind the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y

and show that the mixed partial derivatives fxy and fyx are equal

- calculus -
**john**, Friday, March 9, 2012 at 4:30pmf'(x)=3x^2+2xy^2+1

f'(Y)=2x^2+3y^2+1

f'(xy)=4xy

f'(yx)=4xy

- calculus -
**john**, Friday, March 9, 2012 at 4:37pmFor part B, your figure there is an ellipsoid, x^2+y^2+z^2=4, so the domain should be (x,y,z):X<4,y<4,z<4

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