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Byju's Answer
Standard XII
Mathematics
Binomial Coefficients
The sum ∑ k =...
Question
The sum
∑
∞
k
=
1
6
k
(
3
k
−
2
k
)
(
3
k
+
1
−
2
k
+
1
)
is equalto
___
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Solution
6
k
(
3
k
−
2
k
)
(
3
k
+
1
−
2
k
+
1
)
=
3
k
.2
k
(
3
k
−
2
k
)
(
3
k
+
1
−
2
k
+
1
)
=
3
k
3
k
−
2
k
−
3
k
+
1
3
k
+
1
−
2
k
+
1
∑
∞
k
=
1
3
k
3
k
−
2
k
−
3
k
+
1
3
k
+
1
−
2
k
+
1
=
3
3
−
2
−
lim
n
→
∞
3
n
3
n
−
2
n
=
3
−
1
=
2
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Similar questions
Q.
The sum
∑
∞
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=
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(
3
k
−
2
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(
3
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=
Q.
∞
∑
k
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(
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lim
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.
.
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k
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Q.
Solve:
l
i
m
n
→
θ
(
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+
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Q.
Find $\sum_{k=0}^{
\infty
}12(\dfrac{2}{3})^k - \sum_{\infty}^{k=0}18(\dfrac{-1}{2})^k =$
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