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calculati (5^7+5^8+5^9):5^6

Răspuns :

(5^7+5^8+5^9):5^6 =

= 5^7 × ( 1 + 5^1 + 5^2) : 5^6 =

= 5^7 × (6 + 25) : 5^6 =

= 5^7 : 5^6 × 31 =

= 5 × 31 =

= 155