If u, v is a member ofR^n, find u · v given that |u + v| = 1 and |u − v| = 5.
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Originally Posted by ah-bee If u, v is a member ofR^n, find u · v given that |u + v| = 1 and |u − v| = 5. HINT: $\displaystyle |u+v|^2 - |u-v|^2 = 4(u.v)$
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