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JEE Main 25 June 2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 26 of 90
 
Marks: +1, -0
Let
→
b
=
^
i
+
^
j
+λ
^
k
,λ∈R. If
→
a
 is a vector such that
→
a
×
→
b
=13
^
i
−
^
j
−4
^
k
 and
→
a
â‹…
→
b
+21=0, then (
→
b
−
→
a
)â‹…(
^
k
−
^
j
)+(
→
b
+
→
a
)â‹…(
^
i
−
^
k
) is equal to____
[25-Jun-2022-Shift-2]
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