Teaching UP TGT Mock Test Series 2025 Quantitative Aptitude Progression Arithmetic Progression

यदि किसी अनुक्रम का nवाँ पद \(\frac{2 n+5}{7}\) है, तो इसके प्रथम 140 पदों का योगफल कितना है?

1
2840
2
2780
3
2920
4
5700
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