Equation of a plane passing through a Point

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SUMMARY

The discussion focuses on finding the equation of a plane that passes through the point P(0, -5, 3) and is parallel to the vectors v = 4j - k and w = i + 2j + 3k. The normal vector to the plane, calculated as 14i - 1j - 4k, is derived from the cross product of vectors v and w. To determine the equation of the plane, one can use the point-normal form, which is straightforward when a point and a normal vector are known. The participants emphasize the importance of referencing textbooks or class notes for examples of this method.

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  • Understanding of vector operations, specifically cross products
  • Familiarity with the point-normal form of a plane equation
  • Basic knowledge of three-dimensional coordinate systems
  • Ability to manipulate vector notation and equations
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  • Review the point-normal form of a plane equation in 3D geometry
  • Practice calculating cross products of vectors using examples
  • Explore additional problems involving planes and vectors in three-dimensional space
  • Study the geometric interpretation of normal vectors in relation to planes
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Let P(0,-5,3) vector v=4j -k and vector w=i+2j+3k

Find an eqaution of the plane passing through P and parallel to both v and w

so i found the vector perpendicular to both v and w which is 14 -1 -4 but I am not sure to find a plane that parrallel to v and w
 
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Punkyc7 said:
Let P(0,-5,3) vector v=4j -k and vector w=i+2j+3k

Find an eqaution of the plane passing through P and parallel to both v and w

so i found the vector perpendicular to both v and w which is 14 -1 -4 but I am not sure to find a plane that parrallel to v and w
The vector you found, 14i - 1j - 4k (or <14, -1, -4>) is normal to (perpendicular to) the plane you're trying to find.

If you have a point on a plane and a normal to the plane, it's very easy to find the equation of the plane. Your textbook and/or notes from class should have an example of how to do this.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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