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81 la puterea 7 : la 3 la puterea 5 la puterea 2


Răspuns :

_81^7=(9^2)^7=9^14=(3^2)^14=3^28
_3^5^2=3^25
_3^28:3^25=3^3=27
81 la puterea 7=22.876.792.454.961
81 la puterea 3=531.441
81 la puterea 5=3.486.784.401
81 la puterea 2=6.561