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30. The value of c for which the angle between the vectors cx i - 6 j + 3 k and x i - 2 j + 2cx k is always acute for x€R.??

Answer» 30. The value of c for which the angle between the vectors cx i - 6 j + 3 k and x i - 2 j + 2cx k is always acute for x€R.??


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