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Prema Kandukuri Grade: Upto college level
`        1+5+13+25+.........`
7 years ago

## Answers : (2)

Shankararama Sharma
35 Points
```										The answer of sum upto n terms is,
(2n+1)(n+1)+ 3n(n+1) + 3n
```
7 years ago
Fawz Naim
37 Points
```										Let
Sn= 1+5+13+25+........T(n-1)+Tn
Sn=     1+5+13+25.................T(n-1)+Tn
__________________________________________
now subtracting the two equations
0=1+4+8+12+.......upto n terms -Tn
Tn=1+(4+8+12+.......upto (n-1)terms)
Tn=1+((n-1)/2[8+(n-2)4]
solve it to get the nth term
and to solve it use summation method
```
7 years ago
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