Questão 111013

\(2^n-\left\{1+n+\frac{n\left(n-1\right)}{2}+\frac{n\left(n-1\right)\left(n-2\right)}{6}\right\}\)

\(2^n-\left\{1+n+\frac{n\left(n-1\right)}{2}\right\}\)

\(2^n-\left\{1+n+\frac{n\left(n-1\right)\left(n-2\right)}{6}\right\}\)

\(2^n+1-\left\{n+\frac{n\left(n-1\right)}{2}+\frac{n\left(n-1\right)\left(n-2\right)}{6}\right\}\)

\(2^n+1+n-\left\{\frac{n\left(n-1\right)}{2}+\frac{n\left(n-1\right)\left(n-2\right)}{6}\right\}\)