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efectuați 5la puterea 13x5la puterea15:(5) la puterea 47


Răspuns :

5^13×5^15÷5^47

5^13+15:5^47 =>5^28:5^47=> 5^28-47

=>5^-19

sau poti folosi formula a^-n=1/a^n = 1/5^19