Answered

1-2 +3 - 4 + 5 - 6+ ... + 41
işleminin sonucu kaçtır?
A) 17
B) 19
C) 21
D) 23
E) 25

Sagot :

40’a kadar hep (-1)’ler toplanacak.
20 sayı kullanılıyor sonuç 20 . (-1)= (-20)
Sonra 41 + (-20)= 21

Cevap C şıkkı.

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