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Find the sum to n terms of the series 3....

Find the sum to n terms of the series 3.8 +6.11 +9.14 + ...

Text Solution

Verified by Experts

`3xx8+6xx11+9xx14+........`
By observation, the first and second parts of each term form an AP
The `n^(th)`term would be
`3n(3n+5)`
...
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