Domain of a function

• Mar 23rd 2009, 02:44 PM
Apprentice123
Domain of a function
Find the domain of a function

$f(x,y)=\sqrt{25-x^2-y^2}$
• Mar 23rd 2009, 03:25 PM
stapel
Quote:

Originally Posted by Apprentice123
Find the domain of a function

$f(x,y)=\sqrt{25-x^2-y^2}$

Hint: Are square roots defined for all inputs, or only non-negative ones? What inequality does this suggest for the allowable input values for this function? (Wink)