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Byju's Answer
Standard X
Mathematics
Compound Ratio
What is the c...
Question
What is the compounded ratio of
(
a
−
b
)
:
(
a
+
b
)
,
(
a
−
b
)
2
:
(
a
+
b
)
2
and
(
a
+
b
)
3
:
(
a
−
b
)
3
A
8
:
9
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B
5
:
7
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C
1
:
1
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D
3
:
5
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Solution
The correct option is
C
1
:
1
By the defination of compound ratio these ratio can be expressed as
a
−
b
a
+
b
×
(
a
−
b
)
2
(
a
+
b
)
2
×
(
a
+
b
)
3
(
a
−
b
)
3
=
1
1
Hence,
1
:
1
.
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0
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Q.
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2
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(
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2
b
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+
a
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to
∞
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Q.
If
a
+
b
=
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and
a
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Q.
Which of the following equations are correct?
(
i
)
(
a
+
b
+
c
)
2
=
a
2
+
b
2
+
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a
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(
i
i
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)
3
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3
+
b
3
+
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a
b
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a
−
b
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(
i
i
i
)
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a
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b
)
3
=
a
3
−
b
3
−
3
a
b
(
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+
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i
v
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2
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2
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