Question: Exercise 3.1 Let X be a real inner product space with inner product (, .) and as- sociated norm || . ||. Prove the Parallelogram

Exercise 3.1 Let X be a real inner product space with

Exercise 3.1 Let X be a real inner product space with inner product (, .) and as- sociated norm || . ||. Prove the Parallelogram Law: If x and y are elements of X, then 1x + yll2 + 1/x - x 112 = 2 (11 x112 + 11x1/2)

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