Tìm các nghiệm nguyên dương của phương trình \(\frac{1}{x} + \frac{1}{y} = \frac{1}{3}\)
A.\(\left( {x;y} \right) = \left( {2;8} \right),\left( {8;2} \right),\left( {4;4} \right)\)
B.\(\left( {x;y} \right) = \left( {4;12} \right),\left( {12;4} \right),\left( {6;6} \right)\)
C.\(\left( {x;y} \right) = \left( {4;8} \right),\left( {8;4} \right),\left( {2;2} \right)\)
D.\(\left( {x;y} \right) = \left( {6;8} \right),\left( {8;6} \right),\left( {2;2} \right)\)
A.\(\left( {x;y} \right) = \left( {2;8} \right),\left( {8;2} \right),\left( {4;4} \right)\)
B.\(\left( {x;y} \right) = \left( {4;12} \right),\left( {12;4} \right),\left( {6;6} \right)\)
C.\(\left( {x;y} \right) = \left( {4;8} \right),\left( {8;4} \right),\left( {2;2} \right)\)
D.\(\left( {x;y} \right) = \left( {6;8} \right),\left( {8;6} \right),\left( {2;2} \right)\)
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Hóa Học lớp 12
