Posted by **Segun** on Monday, April 16, 2007 at 10:28am.

Dtermine the value of a so that

u=2i+aj+k and 4i-2j-2k are perpendicular

Did you just start this topic?

This is a very easy question.

if two vectors are perpendicular, then their dot product must be zero

then (2,a,1).(4,-2,-2)=0

8-2a-2=0

a=3

## Answer this Question

## Related Questions

- math - two vectors are defined as a=2i+xj and b=i-4j. find value of x if a) the ...
- math - two vectors are defined as a=2i+xj and b=i-4j. find value of x if a) the ...
- perpendicular vectors - Find two unit vectors each of which is perpendicular to ...
- vectors - Determine whether each statement is true or false. Provide a brief ...
- Calculus and Vectors - THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ...
- Vectors - Determine two unit vectors that are perpendicular to both a=[-5,6,2] ...
- Calulas and VECTORS - THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ...
- Physica - The sum of two vectors A and B is maximum when both vectors are : A)...
- Physica - The sum of two vectors A and B is maximum when both vectors are : A)...
- Physica - The sum of two vectors A and B is maximum when both vectors are : A)...