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Q)

The centre of the circle given by r.(ˆi+2ˆj+2ˆk)=15 and |r(ˆj+2ˆk)|=4 is :


( A ) none of these
( B ) (1, 3, 4)
( C ) (0, 1, 2)
( D ) (-1, 3, 4)

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