question_answer

The value of \[\frac{x+y+z}{{{x}^{-1}}{{y}^{-1}}+{{y}^{-1}}{{z}^{-1}}+{{z}^{-1}}{{x}^{-1}}}\] is

A) \[\frac{1}{xyz}\]             

B)         \[\frac{1}{xy}+\frac{1}{yz}+\frac{1}{xz}\]

C)  \[xyz\]                 

D)         \[xy+yz+zx\]