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CansuDere2003
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j) [(3/5) la puterea 7 : (2- 7/5)la puterea 4 + 5 :5/4 -(3/5)la puterea 3] :8/5=?

Răspuns :

Renatemambouko
 [(3/5)⁷ : (2- 7/5)⁴+ 5 :5/4 -(3/5)³] :8/5=
={(3/5)⁷ : [(10- 7)/5]⁴+ 5 ×4/5 -(3/5)³} :8/5=
=[(3/5)⁷ × (5/3)⁴+ 4 -(3/5)³] ×5/8=
=[(3/5)³ + 4 -(3/5)³] ×5/8=
= 4 ×5/8=
=5/2=2,5

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