The equation of sphere is x2 + y2 + z2 - x + z - 2 = 0, its radius is – McqOptions

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1.	The equation of sphere is x2 + y2 + z2 - x + z - 2 = 0, its radius is
A.	\(\frac{\sqrt 5}{2}\)
B.	\(\sqrt\frac{5}{2}\)
C.	\(\frac{5}{\sqrt2}\)
D.	5
Answer» C. \(\frac{5}{\sqrt2}\)

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