Saturday

September 20, 2014

September 20, 2014

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

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 ...

vectors - Determine whether each statement is true or false. Provide a brief ...

Math - How do you: Find the shortest distance, to two decimal places from the ...

Physics - What is the resultant of two displacement vectors having the same ...

Vectors - Determine two unit vectors that are perpendicular to both a=[-5,6,2] ...

when did child labor start and end in america - pls someone give me an exact ...

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)...