Question

Arătați că următoarele numere naturale sunt cuburi perfecte.​
Clasa 5!!

Answer 1

a) $3^{69} = (3^{23} )^{3} = cub perfect$

e)$19^{33} =( 19^{11} )^{3} = cub perfect$

b)$4^{51} =(4^{17})^{3} = cub perfect$

f) $17^{42} = (17^{14} )^{3} = cub perfect$

c) $8^{61} =( 2^{3} )^{61} = 2^{183} = (2^{61} )^{3} = cub perfect$

g)$27^{28} =(3^{3} )^{28} =3^{84} =(3^{28} )^{3} = cub perfect$

Sper ca te-am ajutat!