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## Main Question or Discussion Point

If you have a polynomial like (1+x)^6 = x^6+6 x^5+15 x^4+20 x^3+15 x^2+6 x+1, What function would you use to pick only the last N terms? For instance, for N=3 pick x^6+6 x^5+15 x^4

I've being using sum of a binomial times something, but was wondering if there is anything more simple.

Thanks!

I've being using sum of a binomial times something, but was wondering if there is anything more simple.

Thanks!