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Mathematics, 18.06.2021 07:00 ggpro4life3000

1) Find the centre and radius of the sphere x² + y2 + z2 - 4x + 6y-8z = 71.​

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1) Find the centre and radius of the sphere x² + y2 + z2 - 4x + 6y-8z = 71.​...
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