Sum of first n terms of 1.4 + 4.7 + 7.10 + 10.13 + ……………… is

Sum of first n terms of 1.4 + 4.7 + 7.10 + 10.13 + ……………… is

A) Σn² – 4Σn + n

B) 9Σn² – 3Σn – 2n

C) Σn² – 3Σn + 4

D) 9Σn² – 3Σn – 2

Monjur Alahi

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2025-01-04 04:42

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