Question : The vectors 2î+ 3ĵ− 2k̂, 5î+ aĵ+ k̂ and −î+ 2ĵ+ 3k̂ are coplanar when 𝑎 is
(A) -9
(B) 9
(C) -18
(D) 18
Answer : option (F)
Solution :

Question : The vectors 2î+ 3ĵ− 2k̂, 5î+ aĵ+ k̂ and −î+ 2ĵ+ 3k̂ are coplanar when 𝑎 is
(A) -9
(B) 9
(C) -18
(D) 18
Answer : option (F)
Solution :