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Byju's Answer
Standard XII
Mathematics
Greatest Binomial Coefficients
Prove that th...
Question
Prove that the sum of the series
C
1
C
0
+
2
C
2
C
1
+
3
C
3
C
2
+
.
.
.
.
+
n
C
n
C
n
−
1
=
n
(
n
+
1
)
2
.
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Solution
C
1
C
0
=
n
1
=
n
=
C
2
C
1
=
2
n
(
n
−
1
)
2
n
=
(
n
−
1
)
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
n
C
n
C
n
−
1
=
1
n
×
n
=
1
∴
n
+
1
(
n
−
1
)
+
−
−
−
−
−
−
−
+
1
=
sum of
n
consequent
−
time integers
=
n
(
n
+
1
)
2
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0
Similar questions
Q.
c
1
c
0
+
2
c
2
c
1
+
3
c
3
c
2
+
.
.
.
.
.
.
.
.
.
+
n
c
n
c
n
−
1
=
n
(
n
+
1
)
2
Q.
Solve
C
1
C
0
+
2
C
2
C
1
+
3
C
3
C
2
+
⋯
⋯
+
n
C
n
C
n
−
1
=
n
(
n
+
1
)
2
Q.
If
c
0
,
c
1
,
c
2
,
.
.
.
.
.
.
.
c
n
denote the coefficients in the expansion of
(
1
+
x
)
n
, prove that
c
1
c
0
+
2
c
2
c
1
+
3
c
3
c
2
+
.
.
.
n
c
n
c
n
−
1
=
n
(
n
+
1
)
2
.
Q.
If
c
0
,
c
1
,
c
2
,
.
.
.
.
c
n
denote the coefficients in the expansion of
(
1
+
x
)
n
, prove that
c
1
c
0
+
2
c
2
c
1
+
3
c
3
c
2
+
.
.
.
.
.
+
n
c
n
c
n
−
1
=
n
(
n
+
1
)
2
.
Q.
If
C
0
,
C
1
,
C
2
,
.
.
.
C
n
are the binomial coefficients in the expansion of
(
1
+
x
)
n
then prove that:
C
1
C
0
+
2
C
2
C
1
+
3
C
3
C
2
+
.
.
.
.
+
n
C
n
C
n
−
1
=
n
(
n
+
1
)
2
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