1.

The unit vector perpendicualr to both the vectors hati+2hatj-2hatk and -hati+2hatj+2hatk is ………………

Answer»

`(1)/(SQRT(5))(2hati-hatk)`
`(1)/(sqrt(5))(-2hati+hatk)`
`(1)/(sqrt(5))(2hati+hatj+hatk)`
`(1)/(sqrt(5))(2hati+hatk)`

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