👤

a=1+2+2la puterea a2a+2 la puterea a3a+.....+2la puterea 59. Aratati ca a este patrat perfect si cub perfect

Răspuns :

[tex]a+1=1+1+2+2^2+2^3+...+2^{59}[/tex]
[tex]a+1=2+2+2^2+2^3+...+2^{59}[/tex]
[tex]a+1=2^2+2^2+2^3+2^4+...+2^{59}[/tex]
[tex]a+1=2\cdot2^2+2^3+2^4+...+2^{59}[/tex]
[tex]a+1=2\cdot2^3+2^4+...+2^{59}[/tex]
..............................................................................
[tex]a+1=2^{60}\Rightarrow a=2^{60}-1[/tex]