Răspuns :
a) . . . n=3⁴ * (45-44) = (3²)² = 9² = p.p. => √n = √9² = 9 ;
b) . . . n=51 * (1+2+3+...+50)=
=51 * (50*51:2) =
=51 + 51 * 25 =
=51 * (1+25) = 1326 ≠ p.p. => √n = √1326 ≈ 36.41 ...
b) . . . n=51 * (1+2+3+...+50)=
=51 * (50*51:2) =
=51 + 51 * 25 =
=51 * (1+25) = 1326 ≠ p.p. => √n = √1326 ≈ 36.41 ...