Byju's Answer
Standard XII
Mathematics
Summation by Sigma Method
13-23+33-43+…...
Question
1
3
−
2
3
+
3
3
−
4
3
+
.
.
.
.
+
9
3
=
A
425
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B
-425
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C
475
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D
-475
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Solution
The correct option is
C
425
1
3
−
2
3
+
3
3
−
4
3
+
.
.
.
.
+
9
3
=
1
3
+
2
3
+
3
3
+
4
3
+
.
.
.
.
+
9
3
−
2
(
2
3
+
4
3
+
6
3
+
8
3
)
=
(
9
×
10
2
)
−
16
(
1
3
+
2
3
+
3
3
+
4
3
)
=
45
2
−
16
(
4
×
5
2
)
2
=
45
2
−
40
2
=
425
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Q.
1
3
−
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Q.
Find:
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Q.
Find the sum of
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Q.
The sum of the series 1
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is:
Q.
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)
−
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