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EAMCET Engineering 2009 Solved Paper

Section: Mathematics
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Question : 115 of 160
 
Marks: +1, -0
Suppose
→
a
=λ
^
i
−7
^
j
+3
^
k
,
→
b
=λ
^
i
+
^
j
+2λ
^
k
. If the angle between
→
a
 and
→
b
 is greater than 90∘, then λ satisfies the inequality
Validate
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