I have managed to do part (a) and used Abel's Identity to prove part (b), but I don't know how to proceed with part (c).

Any help would be great here.

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- Jul 21st 2009, 12:04 AM #1

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- Jul 21st 2009, 03:08 PM #2
Ok, from part b we're given .

Now let tend to infinity on both sides.

You need to show as . Then we know and we're done.

Notice since . So . This now becomes easier to verify as .

See here http://en.wikipedia.org/wiki/Logarit...otic_expansion.

- Aug 9th 2009, 01:25 AM #3

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