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Daca a/b=3/7,atunci a+b/b-a=...?​

Răspuns :

Răspuns:

a/b=3/7=>a=3b/7

(a+b)/(b-a)=(3b/7+⁷⁾b)/(⁷⁾b-3b/7)=(3b+7b)/(7b-3b)=(10b/4b)⁽² ᵇ=5/2