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Va roog repede nu am nicio idee
Ex 5 plsss


Va Roog Repede Nu Am Nicio IdeeEx 5 Plsss class=

Răspuns :

Răspuns:

32/81  

Explicație pas cu pas:

1 - (7/9)¹⁷ : [(7/9)·(7/9)⁴]³ = ?

1 - (7/9)¹⁷ : [(7/9)·(7/9)⁴]³ = 1 - (7/9)¹⁷ : [(7/9)¹⁺⁴]³ =

= 1 - (7/9)¹⁷ : [(7/9)⁵]³ = 1 - (7/9)¹⁷ : (7/9)⁵ˣ³ =

= 1 - (7/9)¹⁷ : (7/9)¹⁵ = 1 - (7/9)¹⁷⁻¹⁵ = 1 - (7/9)² =

= ⁸¹⁾1 - 49/81 = (81-49)/81 = 32/81