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NDA Math Three Dimensional Geometry

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Consider the following for the next three (03) items that follow :
The plane 6x+ky+3z−12=06x + ky + 3z - 12 = 0 where k≠0k \neq 0 meets the coordinate axes at A,BA, B and CC respectively. The equation of the sphere passing through the origin and A,B,CA, B, C is x2+y2+z2−2x−3y−4z=0x^{2} + y^{2} + z^{2} - 2x - 3y - 4z = 0
[NDA-I 2022]
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