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KEAM 2020 Math Paper

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Question : 69 of 120
 
Marks: +1, -0
Let
→
a
=
^
i
+2
^
j
−3
^
k
 and
→
b
=λ
^
j
+3
^
k
, If the projection of a on b is equal to the projection of
→
b
 on
→
a
 , then the valuesof λ are (A)±√7
Validate
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