Question: And radius for the first one b) Find the direction of vector v. 4) Show that the equation x2 + y2 + z2 = 12x
And radius for the first one

b) Find the direction of vector v. 4) Show that the equation x2 + y2 + z2 = 12x +2y represent a sphere. Find its center and 5) Find the rectangular coordinates for the point whose polar coordinates are a ) (4
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