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[" S.If "bar(a)" is a nonzero vector of ...

[" S.If "bar(a)" is a nonzero vector of magnitude "*a" ' and "lambda" a nonzero scalar,then "lambdavec a" is unit "],[" vector if "],[[" (A) "lambda=1," (B) "lambda=-1," (C) "a=| lambda|," (D) "a=1/ lambda lambda]]

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