Given that
S(N)=
N
Σ...(2n-1)^3
n=1
Show that
S(N)=N^2(2N^2 - 1)
I tried expanding it and used the following formulas:
Σn=n(n+1)/2
Σn^2=n(n+1)(2n+1)/6
Σn^3=n^2(n+1)^2/4
But it doesn't give the answer.
I also tried substituting (2n-1) directly into the last formula but it also doesn't give the answer.
Please help,
Thanks
Hello, Srimadeva1996!
I tried expanding it and used the following formulas:
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But it doesn't give the answer. . It should!
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