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Byju's Answer
Standard XII
Mathematics
Scalar Triple Product
a ,b ,c are n...
Question
→
a
,
→
b
,
→
c
are noncoplanar vectors and
→
p
,
→
p
,
→
r
as defined as
→
p
=
→
b
×
→
c
[
→
b
→
c
→
a
]
,
→
q
=
→
c
×
→
a
[
→
c
→
a
→
b
]
,
→
r
=
→
a
×
→
b
[
→
a
→
b
→
c
]
,
(
→
a
+
→
b
)
.
→
p
+
(
→
b
+
→
c
)
.
→
q
+
(
→
c
+
→
a
)
.
→
r
is equal to
A
0
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B
1
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C
2
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D
3
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Solution
The correct option is
B
3
(
→
a
+
→
b
)
⋅
(
→
b
+
→
c
)
[
→
b
→
c
→
a
]
+
(
→
b
+
→
c
)
⋅
(
→
c
×
→
a
)
[
→
c
→
a
→
b
]
+
(
→
c
+
→
a
)
⋅
(
→
a
×
→
b
)
[
→
a
→
b
→
c
]
=
→
a
⋅
(
→
b
×
→
c
)
[
→
b
→
c
→
a
]
+
0
+
→
b
⋅
(
→
c
×
→
d
)
[
→
c
→
a
→
b
]
+
0
+
→
c
⋅
(
→
a
×
→
b
)
[
→
a
→
b
→
c
]
+
0
=
[
→
a
→
b
→
c
]
[
→
b
→
c
→
a
]
+
[
→
b
→
c
→
a
]
[
→
c
→
a
→
b
]
+
[
→
c
→
a
→
b
]
[
→
a
→
b
→
c
]
=
1
+
1
+
1
=
3
Suggest Corrections
0
Similar questions
Q.
Let
→
a
,
→
b
,
→
c
be three non-coplanar vector and
→
p
,
→
q
,
→
r
be vectors defined by the relations
→
p
=
→
b
×
→
c
[
→
a
→
b
→
c
]
,
→
q
=
→
c
×
→
a
[
→
a
→
b
→
c
]
,
→
r
=
→
a
×
→
b
[
→
a
→
b
→
c
]
then the value of the expression
(
→
a
+
→
b
)
.
→
p
+
(
→
b
+
→
c
)
.
→
q
+
(
→
c
+
→
a
)
.
→
r
is equal to
Q.
Let
a
,
b
and
c
be three non-coplanar vectors and let
p
,
q
and
r
be vectors defined by the relations
p
=
b
×
c
a
b
c
,
q
=
c
×
a
a
b
c
and
r
=
a
×
b
a
b
c
Then the value of the expression
(
a
+
b
)
.
p
+
(
b
+
c
)
.
q
+
(
c
+
a
)
.
r
is equal to
Q.
Let
→
a
,
→
b
,
→
c
be non coplanar vectors. If
→
p
=
→
b
×
→
a
[
→
a
→
b
→
c
]
,
→
q
=
→
c
×
→
a
[
→
a
→
b
→
c
]
,
→
r
=
→
a
×
→
b
[
→
a
→
b
→
c
]
then
(
→
a
+
→
b
)
.
→
p
+
(
→
b
+
→
c
)
.
→
q
+
(
→
c
+
→
a
)
.
→
r
=
Q.
State true or false:
If
a
,
b
,
c
∈
+
R
, such that
a
+
b
+
c
=
p
then,
b
c
a
+
c
a
b
+
a
b
c
≥
p
.
Q.
Let
a
,
b
and
c
be three non-coplanar vectors, and let
p
,
q
and
r
be the vectors defined by the relation
p
=
b
×
c
[
a
b
c
]
,
q
=
c
×
a
[
a
b
c
]
,
and
r
=
a
×
b
[
a
b
c
]
,
Then the value of the expression
(
a
+
b
)
⋅
p
+
(
b
+
c
)
⋅
q
+
(
c
+
a
)
⋅
r
is equal to
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