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Byju's Answer
Standard XII
Mathematics
Complement
Let A=a1,a2,a...
Question
Let A={a1,a2,a3,a4}where a1>a2>a3>a4 The total no of unordered pairs of disjoint subsets of A is equal to
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Similar questions
Q.
If
a
1
,
a
2
,
a
3
,
a
4
,
a
5
>
0
then
a
1
a
2
+
a
3
+
a
2
a
3
+
a
4
+
a
3
a
4
+
a
5
+
a
4
a
5
+
a
1
+
a
5
a
1
+
a
2
≥
5
2
Q.
If
a
1
,
a
2
,
a
3
,
a
4
are in AP, then
1
√
a
1
+
√
a
2
+
1
√
a
2
+
√
a
3
+
1
√
a
3
+
√
a
4
is equal to
Q.
If
a
1
,
a
2
,
a
3
,
a
4
are terms of an AP, then the relation between them is
Q.
If
a
1
,
a
2
,
a
3
,
a
4
,
.
.
.
.
,
a
20
are in AP and
a
1
+
a
20
=
45
, then
a
1
+
a
2
+
a
3
+
a
4
,
.
.
.
.
+
a
20
is equal to
Q.
If
a
1
,
a
2
,
a
3
,
a
4
are the coeffecients of any four consecutive term in the expansion of
(
1
+
x
)
n
, then
a
1
a
1
+
a
2
+
a
3
a
3
+
a
4
is equal to
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