(a) Prove that proju(proju(v)) proju(v).(b) Prove that proju(v proju(v)) 0.(c) Explain
Chapter 1, Problem 1.2.70(choose chapter or problem)
(a) Prove that proju(proju(v)) proju(v).(b) Prove that proju(v proju(v)) 0.(c) Explain (a) and (b) geometrically.
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