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efectuati (5^20+5^19+5^18):5^18

Răspuns :

[tex]( {5}^{20} + {5}^{19} + {5}^{18} ) \div {5}^{18} [/tex]

[tex] = {5}^{20} \div {5}^{18} + {5}^{19} \div {5}^{18} + {5}^{18} \div {5}^{18} [/tex]

[tex] = {5}^{20 - 18} + {5}^{19 - 18} + 1[/tex]

[tex] = {5}^{2} + 5 + 1[/tex]

[tex] = 25 + 5 + 1[/tex]

[tex] = 30 + 1[/tex]

[tex] = 31[/tex]