NDA Math Vector Algebra

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For the next four (04) items that follow:
→
a
+
→
b
+
→
c
=
→
0
and |
→
a
|
=3
,
|
→
b
|=5
and |
→
c
|
=7
[NDA II 2014]
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Question : 97 of 101
 
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What is |
→
a
+
→
b
|
equal to ?
[NDA II 2014]
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