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KEAM 2020 Math Paper

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Question : 68 of 120
 
Marks: +1, -0
If
→
a
=2
^
i
+2
^
j
+3
^
k
 and
→
b
=2
^
i
−
^
j
+
^
k
, then the value of (
→
a
+
→
b
).(
→
a
−
→
b
) is equal to
Validate
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