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Standard XII
Mathematics
Complex Numbers
1 if a b and ...
Question
1 if a b and c are three positive real numbers, show that a/(c+b) + b/(a+c) + c/(a+b) >= 3/2
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Q.
If a, b, c are three positive real number then show :
a
b
+
c
+
b
a
+
c
+
c
a
+
b
≥
3
2
Q.
If a,b, c, d are positive real numbers, then show that
(
a
+
b
+
c
+
d
)
(
1
a
+
1
b
+
1
c
+
1
d
)
≥
16
. What happens when the numbers are all equal?
Q.
Assertion :If a, b, c are three positive real numbers such that
a
+
c
≠
0
and
1
a
+
1
a
−
b
+
1
c
+
1
c
−
b
=
0
then
a
,
b
,
c
are in
H
.
P
Reason: If
a
,
b
,
c
are distinct positive real numbers such that
a
(
b
−
c
)
x
2
+
b
(
c
−
a
)
x
y
+
c
(
a
−
b
)
y
2
is a perfect square, then
a
,
b
,
c
are in
H
.
P
.
Q.
If three positive real numbers
a
,
b
,
c
are in A.P. such that
a
b
c
=
4
, then the minimum value of
b
is
Q.
If three positive real numbers a, b, c are in A.P. such that abc
=
4
, then the minimum value of b is
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