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JEE Mains 24-Jan-2023 Shift 2 Solved Paper

Section: Mathematics
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Question : 86 of 90
 
Marks: +1, -0
Let
→
a
=
^
i
+2
^
j
+λ
^
k
,‌‌
→
b
=3
^
i
−5
^
j
−λ
^
k
,‌‌
→
a
â‹…
→
c
=7, 2
→
b
â‹…
→
c
+43=0,
→
a
×
→
c
=
→
b
×
→
c
. Then |
→
a
â‹…
→
b
| is equal to
[24-Jan-2023 Shift 2]
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