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JEE Main 29 June 2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 21 of 90
 
Marks: +1, -0
Let
→
a
=
^
i
−2
^
j
+3
^
k
,
→
b
=
^
i
+
^
j
+
^
k
 and
→
c
 be a vector such that
→
a
+(
→
b
×
→
c
)=
→
0
 and
→
b
â‹…
→
c
=5. Then the value of 3(
→
c
â‹…
→
a
) is equal to____
[29-Jun-2022-Shift-2]
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