Răspuns :
31^19<30^19=(2*15)^19=2^19 * 15^19=2^3 * 2^16 * 15^19=8* (2^4)^4 *15^19=8* 16^4 * 15^19 <8* 15^4 * 15^19= 8*15^23
15^26=15^3 * 15^23=15*225* 15^23 care este evident > 8*15^23
Concluzie a>b
31^19<30^19=(2*15)^19=2^19 * 15^19=2^3 * 2^16 * 15^19=8* (2^4)^4 *15^19=8* 16^4 * 15^19 <8* 15^4 * 15^19= 8*15^23
15^26=15^3 * 15^23=15*225* 15^23 care este evident > 8*15^23
Concluzie a>b