Răspuns :
Răspuns:
a = 13³⁸ · 13: (13³)⁵
a=13³⁸·13:13³ˣ⁵
a=13³⁸·13:13¹⁵
a=13³⁸⁺¹⁻¹⁵
a=13²⁴
a=(13¹²)² → pp
Răspuns :
a = 13^38 *13:(13^3)^5
a = 13^(38+1):13^(3*5)
a = 13^39:13^15
a = 13^(39-15)
a = 13^24
a = 13^(12*2)
a = (13^12)^2 - pătrat perfect.