Lemma
MediumSequences & series
AQuA-RAT train #91412 · Algebra · Sequences & series

The sum of the fourth and twelfth term of an arithmetic progression…

The sum of the fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first 15 terms of the arithmetic progression?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #91412

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