Question

aratati ca n patrat +n +41 este patrat perfect

Answer 1

[tex]n^2+n+41=k^2\\ n(n+1)=k^2-41\\ Pt.\k=41=\ \textgreater \ k^2-41=41^2-41=41(41-1)=40*41=\ \textgreater \ n=40.[/tex]