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find the rth term of an ap .,sum of whose first terms is 2n+3n*n
find the rth term of an ap .,sum of whose first terms is 2n+3n*n

```
3 years ago

Arun
25768 Points
```							 As we knowTn = Sn - Sn-1SimilarilyTr = Sr - Sr-1HenceTr = 2r + 3r^2 - (2(r-1) + 3(r-1)^2)Tr = 2r + 3r^2 -2r +2 - 3r^2 -3 + 6rTr = -1 +6r
```
3 years ago
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• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions