Question

efetuando 1/n - n/(n+1) obtém-se?

Answer 1

$\frac{1}{n}-n(n+1) = \frac{1}{n} - n^{2} +n \\ \\ \frac{1-n(n^{2}+n)}{n} = - n^{3} - n^{2}+1$

Resposta:
- n^{3} - n^{2}+1