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GUJCET 2020 Math Solved Paper

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Question : 40 of 40
 
Marks: +1, -0
For three vectors
→
a
,
→
b
,
→
c
 satisfies
→
a
+
→
b
+
→
c
=0 and |
→
a
|=3,|
→
b
|=4,|
→
c
|=2 then
→
a
.
→
b
+
→
b
.
→
c
+
→
c
.
→
a
= ––––––––
Validate
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