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Byju's Answer
Standard XII
Mathematics
Sum of n Terms
If 12- t1+ ...
Question
If
(
1
2
−
t
1
)
+
(
2
2
−
t
2
)
+
.
.
.
.
.
.
.
.
.
.
+
(
n
2
−
t
n
)
=
1
3
[
n
(
n
2
−
1
)
]
, then find the value of
m
a
x
[
t
n
−
t
k
]
where n, k
ϵ
[
2
,
10
)
and
n
>
k
.
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Solution
1
2
+
2
2
+
3
2
+
4
2
.
.
.
.
.
−
n
∑
n
=
1
t
k
=
1
3
n
(
n
2
−
1
)
n
(
n
+
1
)
(
2
n
+
1
)
6
−
2
n
3
(
n
2
−
1
)
=
∑
n
n
=
1
t
k
=
n
(
n
+
1
)
2
=
∑
n
n
=
1
t
k
=
t
k
is set of first K natural numbers
M
a
x
(
t
n
−
t
k
)
if
n
,
k
(
2
,
10
)
t
10
−
t
2
=
8
as
t
10
=
10
t
2
=
2
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0
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