For what value of x , will the two vector `A= 2hati + 2hatj -x hatk and B =2 hati - hatj - 3hatk ` are perpendicular to each other ?A. `x=-2//3`B. `x=-3//2`C. `x=-4//3`D. `x=-2//3`

For what value of x , will the two vector `A= 2hati + 2hatj -x hatk an

1.	For what value of x , will the two vector `A= 2hati + 2hatj -x hatk and B =2 hati - hatj - 3hatk ` are perpendicular to each other ?A. `x=-2//3`B. `x=-3//2`C. `x=-4//3`D. `x=-2//3`
Answer» Correct Answer - A (a) For vector to be perpendicular , `A.B=0` `implies(2hati+2hatj-xhatk).(2hati-hatj-3hatk)=0` `implies4-2+3x=0` `implies3x=- or x=(-2)/(3)`

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For what value of x , will the two vector `A= 2hati + 2hatj -x hatk and B =2 hati - hatj - 3hatk ` are perpendicular to each other ?A. `x=-2//3`B. `x=-3//2`C. `x=-4//3`D. `x=-2//3`

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