题目函数f（x）=(1)/(x)+sqrt(4-(x^2))的定义域为 ____ ．函数$f（x）=\frac{1}{x}+\sqrt{4-{x^2}}$的定义域为 ____ ．题目解答答案解：由题意得$\left\{\begin{array}{l}{4-{x}^{2}≥0}\\{x≠0}\end{array}\right.$，解得-2≤x≤2且x≠0，故答案为：{x|-2≤x≤2且x≠0}．