A) 1
B) 2
C) 3
D) 5
Correct Answer: B
Solution :
[b] Two, vectors are said to be perpendicular when their dot product is zero. \[\vec{A}.\vec{B}=0\] \[(2\hat{i}+3\hat{j}+4\hat{k})(\hat{i}+2\hat{j}-n\hat{k})=0\] \[2+64n=0\] \[n=2\]You need to login to perform this action.
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