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设二元函数f(x，y)=√(4x-y²)/ln(1-x²-4y²),则函数(t)=lim_{(x,y)→(t,0)}f(x，y)的定义域为____.

高老师2年前 (2024-03-26)高等数学（工本）(00023)11

设二元函数f(x，y)=√(4x-y²)/ln(1-x²-4y²),则函数(t)=lim_{(x,y)→(t,0)}f(x，y)的定义域为____.

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