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並前往https://www.toppr.com/ask/question/if-hatnahatibhatj-is-perpendicular-to-the-vector-hatihatj-then-the-value-of-a-and-b/

If vec n = avec i + bvec j is perpendicular to the vector ...

The magnitude of unity vector is 1. a2+b2 ​=1. a2+a2 ​=2 ​a=1 (from equation 1). a=2 ​1​. and from equation (1), we get. b=−2 ​1​. The correct option is D ...

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