Which of the following is the domain D of the function f(x, y) = ln(x² + y² − 1) ? Select one alternative: D = {(x, y) = R: x² + y² ‡ 1} OD= {(x, y) = R: x² + y² > 1} OD= {(x, y) = R: x + y} OD= {(x, y) = R: x +y > 1}

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