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Question : 55 of 120
Marks:
+1,
-0
Solution:
Given,
=−+2,=+4+ c=λ+9+µ Vectors are mutually orthogonal, so
⋅=0=⋅=⋅ ⋅=2−4+2 =2λ+36+µ ⇒2λ+36+µ=0.....(i)
λ−9+2µ=0....(ii)
On solving Eqs. (i) and (ii), we get
µ=18λ=−27 ∴λ+µ=18−27=−9
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