If \[y=x+{{x}^{2}}+{{x}^{3}}+.......\,\infty ,\,\text{then}\,\,x=\] [DCE 1999]

If \[y=x+{{x}^{2}}+{{x}^{3}}+.......\,\infty ,\,\text{then}\,\,x=\] [D

1.	If \[y=x+{{x}^{2}}+{{x}^{3}}+.......\,\infty ,\,\text{then}\,\,x=\] [DCE 1999]
A.	\[\frac{y}{1+y}\]
B.	\[\frac{1-y}{y}\]
C.	\[\frac{y}{1-y}\]
D.	None of these
Answer» B. \[\frac{1-y}{y}\]

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If \[y=x+{{x}^{2}}+{{x}^{3}}+.......\,\infty ,\,\text{then}\,\,x=\] [DCE 1999]

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