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UPSC NDA I 2014 Mathematics Paper

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For the next two (02) items that follow:
Consider the vectors

→

a

=

∧

i

−2

∧

j

+

∧

k

and

→

b

=4

∧

i

−4

∧

j

+7

∧

k

[NDA I 2014]

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Question : 69

Total: 120

What is the scalar projection of

1
19/9
17/9
23/9

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