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WBPSC 2019 Solved Paper
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© examsnet.com
Question : 143
Total: 200
If
1
2
+
2
2
+
3
2
+
.
.
.
+
n
2
=
n
(
n
+
1
)
(
2
n
+
1
)
6
,
find the value of
5
2
+
6
2
+
7
2
+
.
.
.
.
+
10
2
.
330
345
355
360
Validate
Solution:
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