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Cum se rezolva 1\1•2+1\2•3+1\3•4........1\100•101 = ( \ bara asta inseamna fractie

Răspuns :

Renatemambouko
1/1•2+1/2•3+1/3•4........1/100•101 =
=1/1-1/2+1/2-1/3+1/3-1/4+...+1/100-1/101=
=1/1-1/101=(101-1)/101=100/101

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