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Find the equation of the sphere inscribe...

Find the equation of the sphere inscribed in a tetrahedron whose faces are `x = 0`, `y = 0`, `z = 0` and `2x+2y+z = 1`.

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SHARAM PUBLICATION-QUESTION PAPER 2010-EXERCISE
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  16. Find the distance of the point (1,-2,3) from the plane x-y+z=5, measur...

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