Hello.

I got stuck on this:

Show using the binomial theorem, that if then

Hereīs my brave attempt:

So at first I thougt that each term is bigger than one (this is the part that I got wrong). Then, since there are n terms, the sum must tend to infinity because n tends to infinity and since each term bigger than one.

The b part:

Show that

I want to try this myself after getting the a) part straight but I wonder is there a clue in the b part for solving a?

Any hints, besides replacing my toilet paper with my home assignment?