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宁 李


Last seen: 5 Monate ago Active since 2021

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Paraboloid and Cylinder surface
We know that x^2+y^2=4*f*z, where f is the focal length of the paraboloid. Given that the cylinder (x-a)^2+y^2<=r^2, where a is...

5 Monate ago | 1 answer | 0

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