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The position vectors of Pa n dQ are 5 ha...

The position vectors of `Pa n dQ` are 5` hat i+4 hat j+a hat k` and `- hat i+2 hat j-2 hat k` , respectively. If the distance between them is 7, then find the value of `adot`

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The , perpendicular vector on both of (3hat i +hat j + 2hat k) and (2hat i -2hat j +4hat k) is:

The position vectors of the points Pa n dQ with respect to the origin O are vec a= hat i+3 hat j-2 hat k and vec b=3 hat i- hat j-2 hat k , respectively. If M is a point on P Q , such that O M is the bisector of angleP O Q , then vec O M is a. 2( hat i- hat j+ hat k) b. 2 hat i+ hat j-2 hat k c. 2(- hat i+ hat j- hat k) d. 2( hat i+ hat j+ hat k)

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