KEAM 2022 Math Solved Paper

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Question : 111 of 120
 
Marks: +1, -0
Let
→
a
=
∧
𝑖
+2
∧
𝑗
−3
∧
k
and
→
a
+
→
b
=4
∧
𝑖
−2
∧
𝑗
+λ
∧
k
. If
→
a
⋅
→
b
=4
, then the value of λ is equal to
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