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Homework Help: Find the equation in the general form of the sphere described

  1. Nov 14, 2011 #1
    1. The problem statement, all variables and given/known data
    tangent to x-3y+4z+23=0 at (1,4,-3) with radius sqrt(26)

    2. Relevant equations

    3. The attempt at a solution

    well i initially thought it's possible to set up a system of equations but it didn't work out.
  2. jcsd
  3. Nov 15, 2011 #2


    Staff: Mentor

    Can you find a normal to the plane? It will point toward the center of the sphere (there will be two of them, though). And you know the radius of the sphere, so you should be able to find the center of the sphere.
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