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        <lastmod>2025-03-24T05:52:22.847271672Z</lastmod>
        
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            <Attribute name="title">समांतर श्रेणी (Arithmetic series)</Attribute>
            <Attribute name="description">सूत्र (n/2)⋅(a₁+aₙ) का प्रयोग करके समांतर श्रेणी के मूल्यांकन का अभ्यास करें।</Attribute>
            <Attribute name="author">Ben Alpert</Attribute>
            <Attribute name="type">exercise</Attribute>
            
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