hi,

the question asks for the domain of f(x,y,z)=ln(z-x^2-y^2+2y+3).

which is z-x^2-y^2+2y+3 > 0.

when I try do describe the domain, all I get is 2 > x^2 + (y-1)^2 -z. I have no idea what the shape is like.

any ideas?

thx.

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- Jun 15th 2012, 04:24 PMsjjc1993describe the domain of f(x,y,z)=ln(z-x^2-y^2+2y+3)
hi,

the question asks for the domain of f(x,y,z)=ln(z-x^2-y^2+2y+3).

which is z-x^2-y^2+2y+3 > 0.

when I try do describe the domain, all I get is 2 > x^2 + (y-1)^2 -z. I have no idea what the shape is like.

any ideas?

thx. - Jun 15th 2012, 04:58 PMReckonerRe: describe the domain of f(x,y,z)=ln(z-x^2-y^2+2y+3)
- Jun 15th 2012, 06:43 PMsjjc1993Re: describe the domain of f(x,y,z)=ln(z-x^2-y^2+2y+3)
thanks a lot!