If \[x\ne 0\], \[y\ne 0\], \[z\ne 0\] and , then \[{{x}^{-1}}+{{y}^{-1}}+{{z}^{-1}}\] is equal to

If \[x\ne 0\], \[y\ne 0\], \[z\ne 0\] and , then \[{{x}^{-1}}+{{y}^{-1

1.	If \[x\ne 0\], \[y\ne 0\], \[z\ne 0\] and , then \[{{x}^{-1}}+{{y}^{-1}}+{{z}^{-1}}\] is equal to
A.	\[-\,1\]
B.	\[-\,2\]
C.	\[-\,3\]
D.	none of these
Answer» D. none of these

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If \[x\ne 0\], \[y\ne 0\], \[z\ne 0\] and , then \[{{x}^{-1}}+{{y}^{-1}}+{{z}^{-1}}\] is equal to

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