KCET 2019 Math Solved Paper

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Question : 57 of 60
 
Marks: +1, -0
n
Σ
r=1
(2r−1)
=x
then
lim
n→∞
[
13
x2
+
23
x2
+
33
x2
+...
+
n3
x2
]
=
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