📐 Matematika · Kasrlar va proporsiya · ★★★
Yig'indini hisoblang: 1/(1·2) + 1/(2·3) + 1/(3·4) + … + 1/(9·10)
- A)9/10
- B)1/10
- C)10/11
- D)11/10
👀 To'g'ri javob va tushuntirishni ko'rish
✓ A) 9/10
💡 1/(n(n+1)) = 1/n − 1/(n+1), shuning uchun yig'indi 1 − 1/10 = 9/10.