Published by:
CGP EDU Academic Team
Published on: August 12, 2026
If 
= i + j – k, 
= i – j + k, 
is a unit vector such that 
= 0, 
= 0 then a unit vector 
both 
and 
is perpendicular to
A
(2i – j + k)
B
(j + k)
C
(i + j)
D
(i + k)
Text Solution
Verified by ExpertsThe correct answer is:
B
is along the vector 
= 
= (–1) (i + j – k) – 3(i – j + k) = – 4i + 2j – 2k ⇒ 
= 
⇒ 
= 
; 
= 
= – j(–3) + k.3 = 3(j + k) ⇒ 
= 
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