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NDA Math Vector Algebra
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© examsnet.com
Question : 39
Total: 101
If
→
r
=
x
⋀
i
+
y
⋀
j
+
z
⋀
k
then what is
→
r
.
(
⋀
i
+
⋀
j
+
⋀
k
)
equal to ?
[NDA II 2018]
x
x
+
y
−
(
x
+
y
+
z
)
(
x
+
y
+
z
)
Validate
Solution:
(
x
⋀
i
+
y
⋀
j
+
z
⋀
k
)
⋅
(
⋀
i
+
⋀
j
+
⋀
k
)
=
x
+
y
+
z
© examsnet.com
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