Question : For what value of , A= 2î+ aĵ+ k̂ will be perpendicular to B = 4î− 2ĵ− k̂
(A) 4
(B) 0
(C) 3
(D) 1
Answer : option (C)
Solution :
For what value of , A= 2î+ aĵ+ k̂ will be perpendicular to B = 4î− 2ĵ− k̂
with
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