Simple....
so we have to determine if the value is less than the base....
[tex] 2^{3} =8[/tex] .... is 8<2? No.
[tex] \frac{5}{6} ^{3} = \frac{125}{216} [/tex] No....
[tex] 3^{1}=3 [/tex] Is 3<3? No....
[tex] \frac{5}{2} ^{3} = \frac{125}{8} [/tex] No.....
[tex] 1^{3} =1[/tex] No.....