JEE Advanced 2020 Concept Recapitulation Test 1 Paper 2

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Question : 46 of 54

Marks: +1, -0

Let

→

a

,

→

b

and

→

c

be vectors forming right hand triad. Let p =‌

→

b

×

→

c

[

a

→

b

→

c

]

,

→

q

=‌

c×

→

a

[

a

→

b

c

]

and

→

r

=‌

→

a

×

→

b

[

→

a

→

b

→

c

]

. If X∈R+, then

x[
→
a
→
b
→
c
]+‌
[
→
p
→
q
→
r
]
x
has least value 2
x4[
→
a
→
b
→
c
]2+‌
[
→
p
→
q
→
r
]
x2
has least value (‌
3
2‌
2
3
)
[
→
p
→
q
→
r
]>0
none of the above

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