JEE Mains Model Paper 5

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Question : 87 of 90

Marks: +1, -0

Let

→

a

=

^

i

+2

^

j

+

^

k

,

→

b

=

^

i

−

^

j

+

^

k

,

→

c

=

^

i

+

^

j

−

^

k

. A vector coplanar to

→

a

and

→

b

has a projection along

→

c

of magnitude

1

√3

, then the vector is

4
^
i
−
^
j
+4
^
k
4
^
i
+
^
j
−4
^
k
2
^
i
+
^
j
+
^
k
None of these

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