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a fost răspuns

punctul a..............

Punctul A class=

Răspuns :

Maralea
(1/1*2+1/2*3+1/3*4):(1/4*5+1/5*6+1/6*7)
(1/2+1/6+1/12):(1/20+1/30+1/42),amplificam si⇒
9/12:45/420=3/4:9/84=3/4:3/28=3/4x3/28=7

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