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Question 0404a
Arithmetic and Geometric Progressions (APs, GPs)
Sigma I
Question
Generate new
Evaluate
∑
r
=
1
12
(
8
−
r
)
.
{\displaystyle \sum_{r=1}^{12} \left( 8 - r \right).}
r
=
1
∑
12
(
8
−
r
)
.
Attempt
Your answer:
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