UPSC NDA I 2024 Mathematics Paper
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Question : 52 of 120
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If ( 1 , − 1 , 2 ) ( 2 , 1 , − 1 ) x 2 + y 2 + z 2 + 2 u x + 2 v y + 2 w z − 1 = 0 u + v + w
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