Bài tập  /  Bài đang cần trả lời

Toán học - Lớp 6
16/04 20:00:41
Giải bài có thưởng!

E = 1/6 + 1/66 + 1/176 +..... + 1/9894

E = 1/6 + 1/66 + 1/176 +  ..... + 1/9894
0 trả lời
Hỏi chi tiết
Trợ lý ảo
38
Tham khảo câu trả lời từ Trợ lý ảo Lazi
To find the sum of this series, we need to find a pattern in the denominators of the fractions.

The denominators of the fractions are increasing by 10 each time: 6, 66, 176, ..., 9894.

We can write the denominators as follows:
6 = 6
66 = 6 + 6*10
176 = 6 + 6*10 + 6*10*2
286 = 6 + 6*10 + 6*10*2 + 6*10*3
...

In general, the nth term in the series can be written as:
6 + 6*10 + 6*10*2 + ... + 6*10*(n-1)

This is an arithmetic series with first term a = 6 and common difference d = 6*10 = 60.

The sum of the first n terms of an arithmetic series can be calculated using the formula:
Sn = n/2 * (2a + (n-1)d)

Substitute a = 6 and d = 60 into the formula:
Sn = n/2 * (2*6 + (n-1)*60)
Sn = n/2 * (12 + 60n - 60)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n - 48)
Sn = n/2 * (60n -

Bạn hỏi - Lazi trả lời

Bạn muốn biết điều gì?

GỬI CÂU HỎI
Học tập không giới hạn cùng bạn bè học sinh cả nước, đến LAZI, sôi động, tích cực, trải nghiệm

Hôm nay bạn thế nào? Hãy nhấp vào một lựa chọn, nếu may mắn bạn sẽ được tặng 50.000 xu từ Lazi

Vui Buồn Bình thường

Học ngoại ngữ với Flashcard

×
Gia sư Lazi Gia sư
×
Trợ lý ảo Trợ lý ảo