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Find the sum to n terms of the series :1.2.4+2.3.7+3.4.10+...

Find the sum to n terms of the series :1.2.4+2.3.7+3.4.10+...
 
 

Grade:11

1 Answers

Arun
25750 Points
5 years ago
Dear student
 
We can write general term as
Tr = r (r+1)(1 +3r)
 
Hence 
Tr = r³ + 4r² + r
 
Now you can do yourself

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