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Byju's Answer
Standard XII
Mathematics
Change of Variables
Find the valu...
Question
Find the value of∑_{r=1}^n(4r-1)5^r/(r^2+r
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Similar questions
Q.
Find the value of
∞
∑
r
=
0
tan
−
1
(
1
1
+
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+
r
2
)
Q.
A solid sphere of mass M and radius R having a moment of inertia I about its diameter is recast into a solid disc fo radius r and thickness t. The moment of inertia of the disc about an axis passing the edge and perpendicular to the plane remains I. Then R and r are related as
Q.
Find the sum of the series
∑
n
r
=
0
(
−
1
)
r
.
n
C
r
{
1
2
r
+
3
r
2
2
r
+
7
r
2
3
r
+
15
r
2
4
r
+
.
.
.
.
u
p
t
o
m
t
e
r
m
s
}
Q.
If
r
>
1
and
x
=
a
+
a
/
r
+
a
/
r
2
+
.
.
.
,
y
=
b
+
b
/
r
+
b
/
r
2
+
.
.
.
and
z
=
c
+
c
/
r
+
c
/
r
2
+
.
.
.
,
then value of
x
y
/
z
2
is
Q.
The value of
15
∑
r
=
1
r
2
r
(
r
+
2
)
!
is equal to
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