The lines joining the points of intersection of line \[x+y=1\] and curve \[{{x}^{2}}+{{y}^{2}}-2y+\lambda =0\] to the origin are perpendicular, then the value of \[1/\sqrt{10}\] will be

The lines joining the points of intersection of line \[x+y=1\] and cur

1.	The lines joining the points of intersection of line \[x+y=1\] and curve \[{{x}^{2}}+{{y}^{2}}-2y+\lambda =0\] to the origin are perpendicular, then the value of \[1/\sqrt{10}\] will be
A.	1/2
B.	-1/2
C.	\[1/\sqrt{2}\]
D.	0
Answer» E.

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The lines joining the points of intersection of line \[x+y=1\] and curve \[{{x}^{2}}+{{y}^{2}}-2y+\lambda =0\] to the origin are perpendicular, then the value of \[1/\sqrt{10}\] will be

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