Centre of the sphere 2x²+2y²+2z²-2x+4y+2z+1=0 is

(a) (1, -1 1/2)
(b) (1/2, -1 ½ )
(c) (0, 0, 0)
(d) (1, ½ ½ )

Anurag Mishra Professor Asked on 28th May 2016 in Maths.
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