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The centre of the circle given by vec...

The centre of the circle given by ` vec rdot( hat i+2 hat j+2 hat k)=15a n d| vec r-( hat j+2 hat k)|=4` is a. `(0,1,2)` b. `(1,3,4)` c. `(-1,3,4)` d. none of these

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