WBJEE 2017 Math Solved Paper

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Question : 60 of 75
 
Marks: +1, -0
For any vector
−
x
, the value of (
−
x
×
^
i
)
2
+(
−
x
×
^
j
)
2
+(
−
x
×
^
k
)
2
is equal to
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