Question

A(n)=nla puterea a patra +2 inmultit cu n la puterea a treia -n la puterez a doua - 2 inmultit cu n

Answer 1

[tex]A(n)=n^4+2n^3-n^2-2n\\ A(n)=n^3(n+2)-n(n+2)\\ A(n)=(n+2)(n^3-n)\\ A(n)=n(n+2)(n^2-1)\\ A(n)=n(n+2)(n+1)(n-1)\\ [/tex]