Cho ba phân thức

Câu hỏi: Cho ba phân thức $\frac{\text{1}}{\text{xy}}\text{,}\frac{\text{1}}{\text{yz}}\text{,}\frac{\text{3}}{\text{xz}}$ . Chọn khẳng định đúng?

A. $\frac{\text{1}}{\text{xy}}=\frac{\text{z}}{\text{xyz}}\text{,}\frac{\text{1}}{\text{yz}}=\frac{\text{x}}{\text{xyz}}\text{,}\frac{\text{3}}{\text{xz}}=\frac{\text{3}}{\text{xyz}}$

B. $\frac{\text{1}}{\text{xy}}=\frac{\text{z}}{\text{xyz}}\text{,}\frac{\text{1}}{\text{yz}}=\frac{\text{x}}{\text{xyz}}\text{,}\frac{\text{3}}{\text{xz}}=\frac{\text{3y}}{\text{xyz}}$

C. $\frac{\text{1}}{\text{xy}}=\frac{\text{z}}{\text{xyz}}\text{,}\frac{\text{1}}{\text{yz}}=\frac{\text{1}}{\text{xyz}}\text{,}\frac{\text{3}}{\text{xz}}=\frac{\text{3y}}{\text{xyz}}$

D. $\frac{\text{1}}{\text{xy}}=\frac{\text{1}}{\text{xyz}}\text{,}\frac{\text{1}}{\text{yz}}=\frac{\text{x}}{\text{xyz}}\text{,}\frac{\text{3}}{\text{xz}}=\frac{\text{3y}}{\text{xyz}}$