If \[X=\frac{a-b}{a+b}.y=\frac{b-c}{b+c},Z=\frac{c-a}{c+a},\]then the value of \[\frac{(1+x)(1+y)(1+z)}{(1-x)(1-y)(1-z)}\]is _______.

\[{{a}^{2}}{{b}^{2}}{{c}^{2}}\]

If \[X=\frac{a-b}{a+b}.y=\frac{b-c}{b+c},Z=\frac{c-a}{c+a},\]then the

1.	If \[X=\frac{a-b}{a+b}.y=\frac{b-c}{b+c},Z=\frac{c-a}{c+a},\]then the value of \[\frac{(1+x)(1+y)(1+z)}{(1-x)(1-y)(1-z)}\]is _______.
A.	\[abc\]
B.	\[{{a}^{2}}{{b}^{2}}{{c}^{2}}\]
C.	1
D.	\[-1\]
Answer» D. \[-1\]

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If \[X=\frac{a-b}{a+b}.y=\frac{b-c}{b+c},Z=\frac{c-a}{c+a},\]then the value of \[\frac{(1+x)(1+y)(1+z)}{(1-x)(1-y)(1-z)}\]is _______.

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