Răspuns:
[tex]90 = 2 \times {3}^{2} \times 5[/tex]
[tex]135 = {3}^{3} \times 5[/tex]
[tex]cmmdc = {3}^{2} \times 5 = 45[/tex]
[tex] {15}^{90} = ( {15}^{2} )^{45} = {225}^{45} [/tex]
[tex] {6}^{135} = ( {6}^{3} )^{45} = {216}^{45} [/tex]
[tex] = > {15}^{90} > {6}^{135} [/tex]
