Quantitative Aptitude Progression Arithmetic Progression

శ్రేణి యొక్క n పదాల మొత్తాన్ని కనుగొనండి

12 + 104 + 1006 + 10008 + ----------

1
10(10 n – 1) /9 + 2n × (n + 1)
2
10(10 n – 1) /9 + n × (n + 1)
3
10(10 n + 1) /9 + n × (n - 1)
4
10(10 n – 1) /9 n + n × (n + 1) /2

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