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JEE Main 9 Jan 2019 Shift 2 Solved Paper

Section: Mathematics
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Question : 39 of 90
 
Marks: +1, -0
Let
→
a
 =
^
i
+
^
j
+√2
^
k
 ,
→
b
 = b1
^
i
+b2
^
j
+√2
^
k
 and
→
c
 = 5
^
i
+
^
j
+√2
^
k
 be three vectors such that theprojection vector of
→
b
 on
→
a
 is
→
a
. If
→
a
+
→
b
 is perpendicular to
→
c
 , then |
→
b
| is equal to :
[9 Jan 2019 Shift 2]
Validate
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