Show that when n is even,

I don't know how to approach this question, the 'when n is even' is throwing me, and even without that part, I think I'd struggle. How should I begin?

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- September 29th 2010, 11:13 AMQuacky(Series) Prove the following:
Show that when n is even,

I don't know how to approach this question, the 'when n is even' is throwing me, and even without that part, I think I'd struggle. How should I begin? - September 29th 2010, 11:35 AMHappyJoe
Did you try proving it by induction? It seems fit for this kind of problem.

- September 29th 2010, 11:37 AMQuacky
No, I didn't try induction. The reason is that this chapter is before induction in the textbook, and we didn't cover induction in class untill after the work was set. I suppose it's worth a try though.

- September 29th 2010, 11:51 AMTraveller
Did you cover the formula for summing cubes ?

- September 29th 2010, 12:03 PMQuacky
Yes Traveller, if by that you mean :

But I still can't see a way of applying it to this question specifically. - September 29th 2010, 12:06 PMTraveller
- September 29th 2010, 12:18 PMQuacky
I'll try that now.

- September 29th 2010, 03:41 PMQuacky
It seems I am still unable to solve this problem. Would you elaborate on your post above slightly? I've clearly misunderstood your method.

- September 30th 2010, 04:44 AMHallsofIvy

for n even. - September 30th 2010, 05:54 AMTraveller
- September 30th 2010, 10:11 AMArka
Hello Quacky,

Could you please tell me the name of the book from which you got the sum you posted above ? Thanks a lot ..... - September 30th 2010, 11:11 AMQuacky