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Thread: Vector

  1. April 29th 2008, 02:07 AM #1
    ah-bee
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    Vector

    If
    u, v is a member ofR^n, find u · v given that |u + v| = 1 and |u − v| = 5.
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  2. April 29th 2008, 02:13 AM #2
    Isomorphism
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    Quote Originally Posted by ah-bee View Post
    If
    u, v is a member ofR^n, find u · v given that |u + v| = 1 and |u − v| = 5.
    HINT: |u+v|^2 - |u-v|^2 = 4(u.v)
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