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NDA Math Vector Algebra
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© examsnet.com
Question : 60
Total: 101
If
→
a
=
2
⋀
i
+
3
⋀
j
+
4
⋀
k
and
→
b
=
3
⋀
i
+
2
⋀
j
−
λ
⋀
k
are perpendicular, then what is the value of 𝜆?
[NDA I 2017]
2
3
4
5
Validate
Solution:
(
2
)
(
3
)
+
(
3
)
(
2
)
−
4
λ
=
0
⇒
λ
=
3
© examsnet.com
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