Răspuns :
Explicație pas cu pas:
n=(9⁶⁵+9⁶⁴+9⁶³):(7×13)
n=9⁶³(9²+9¹+1):(7×13)
n=9⁶³×91 :91 =9⁶³
9⁶³=(9²¹)³ => cub perfect
9⁶³=(3²)⁶³=(3⁶³)² => patrat perfect
Răspuns:
n=(9⁶⁵+9⁶⁴+9⁶³):(7×13)
n=(9²+9+1)×9⁶³:91
n=(81+9+1)×9⁶³:91
n=91×9⁶³:91
n=1×9⁶³
n=9⁶³
9⁶³=(9²¹)³ (cub perfect)
9⁶³=(3⁶³)² (patrat perfect)