Question

(n-1)totu la 3=2^6*5^3 nEN

Answer 1

$(n-1)^{3}=2^{6}*5^{3}$

$(n-1)^{3}=(2^{2})^{3}*5^{3}$

$(n-1)^{3}=4^{3}*5^{3}$

$(n-1)^{3}=20^{3}$

=>$n-1=20$

=>$n=20+1$

=>$\boxed{n=21}$

Answer 2

2∧6×5∧3=2∧3×2∧3×5∧3=20∧3   din egalitatea data ⇒ n-1=20⇒n=19