Did you try starting off by adding those 2 equations together?
Adding them and multiplying them .
But what do we have to do next ?
Have you tried just calculating , , , ...?
How? you mean to set n=2011
I mean exactly what I said! Calculate as many of , , ,... as required until it dawns on you!
I fear that this is completely not the right way to do it but thank you.
Have no fear
Halls is here !