Question

if a vector i+j+k is perpendicular to the vector 4i-2j+alpha k , then the value of alpha is​

Answer 1

Answer:

Option 4 is the answer i.e. -2

Explanation:

If vectors are perpendicular then their cross product must be 0

Here also Vector 1 is perpendicular to Vector 2

Therefore (i+j+k) . (4i-2j+ alpha k)==>0

=== 4-2+ alpha=0 ;

So,, alpha ==> -2

I think this will help you