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Subjects
Mathematics State Board
Class 10
Numbers and Sequences
Sum to n terms of an A.P.
25.
Five marks exercise problems XI
Exercise condition:
5
m.
Find the sum
a
−
b
a
+
b
+
3
a
−
2
b
a
+
b
+
5
a
−
3
b
a
+
b
+
...
to
12
terms
.
Answer
:
The sum \(=\)
i
i
i
−
i
i
i
+
i
[
Note
: Enter coefficients and variables in the separate boxes.]
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