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Math Help - Vector

  1. #1
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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. #2
    Lord of certain Rings
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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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