\(B = \left( {\dfrac{x}{{x - y}} - \dfrac{y}{{x + y}}} \right):\left( {\dfrac{{x + y}}{{x - y}} - \dfrac{{2xy}}{{{x^2} - {y^2}}}} \right)\)
A.\(B = -1\)
B.\(B = 1\)
C.\(B = \dfrac{x}{y}\)
D.\(B = \dfrac{y}{x}\)
A.\(B = -1\)
B.\(B = 1\)
C.\(B = \dfrac{x}{y}\)
D.\(B = \dfrac{y}{x}\)
Loga
Hóa Học lớp 12
