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Year 12 Specialist (Unit 3 & 4) Vector equations

Equations of spheres

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Questions
Question 1
162852

For the sphere with centre \((-1,2,1)\) and radius \(3\), find:
i) the cartesian equation
ii) the vector equation.

i) \((x+1)^2+(y-2)^2+(z-1)^2=9\)
ii) \(|r-(-i+2 j+k)|=3\)

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