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1+3+5+.....+99 repedeee​

Răspuns :

Răspuns:

1+3+5+...+99=[(1+99)·50]/2=100·25=2500

1 + 3 + 5 + ... + 99 =

( 1 + 99 ) × 50 : 2 =

100 × 50 : 2 =

5000 : 2 = 2500