\[\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{+}\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{=?}\]

\[\frac{2{{x}^{2}}}{{{y}^{2}}-{{x}^{2}}}\]

\[\frac{2{{y}^{2}}}{{{y}^{2}}-{{x}^{2}}}\]

\[\frac{2{{y}^{2}}}{{{y}^{2}}+{{z}^{2}}}\]

\[\frac{2{{x}^{2}}}{{{y}^{2}}+{{x}^{2}}}\]

\[\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\m

1.	\[\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{+}\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{=?}\]
A.	\[\frac{2{{y}^{2}}}{{{y}^{2}}-{{x}^{2}}}\]
B.	\[\frac{2{{x}^{2}}}{{{y}^{2}}-{{x}^{2}}}\]
C.	\[\frac{2{{y}^{2}}}{{{y}^{2}}+{{z}^{2}}}\]
D.	\[\frac{2{{x}^{2}}}{{{y}^{2}}+{{x}^{2}}}\]
Answer» B. \[\frac{2{{x}^{2}}}{{{y}^{2}}-{{x}^{2}}}\]

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\[\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{+}\frac{{{\mathbf{x}}^{\mathbf{-1}}}}{{{\mathbf{x}}^{\mathbf{-1}}}\mathbf{+}{{\mathbf{y}}^{\mathbf{-1}}}}\mathbf{=?}\]

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