Nghiệm của hệ phương trình \(\left\{ \begin{array}{l}\frac{1}{x} + \frac{1}{y} = \frac{8}{5}\\\frac{2}{x} - \frac{5}{y} = - \frac{1}{3}\end{array} \right.\) là:
A.\(\left( { - \frac{{23}}{{21}}; - \frac{{53}}{{105}}} \right)\)
B.\(\left( {\frac{{23}}{{21}};\frac{{53}}{{105}}} \right)\)
C.\(\left( { - \frac{{21}}{{23}}; - \frac{{105}}{{53}}} \right)\)
D.\(\left( {\frac{{21}}{{23}};\frac{{105}}{{53}}} \right)\)
A.\(\left( { - \frac{{23}}{{21}}; - \frac{{53}}{{105}}} \right)\)
B.\(\left( {\frac{{23}}{{21}};\frac{{53}}{{105}}} \right)\)
C.\(\left( { - \frac{{21}}{{23}}; - \frac{{105}}{{53}}} \right)\)
D.\(\left( {\frac{{21}}{{23}};\frac{{105}}{{53}}} \right)\)
Loga
Hóa Học lớp 12
