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a fost răspuns

Efectuati:

1+2+3+...+100
___________
2+4+6+...+200

Răspuns :

Iakabcristina2
1+2+3+...+100=100x101/2=5050
2+4+6+...+200=2(1+2+3+...+100)=2x5050=10100
5050/10100=1/2
(1+2+3+...+100)/(2+4+6+...+200)=

=(1+2+3+...+100)/2(1+2+3+...100)

=1/2

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