Mathematics · Sequences and Series
मान लीजिए a1, a2, 2, a3, a4 एक समांतर-गुणोत्तर श्रेणी (arithmetico-geometric progression) में हैं। यदि संबंधित गुणोत्तर श्रेणी का सार्वअनुपात 2 है और इस समांतर-गुणोत्तर श्रेणी के सभी 5 पदों का योग 492 है, तो a4 का मान बराबर है:
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