Gọi phân số tối giản phải tìm là a/b; (a; b ∈ Z; b ≠ 1), ƯCLN (a, b) = 1

Ta có a.b = 3150 = 2. 32. 52. 7 và a, b đều là ước của 3150.

Vì phân số này có thể viết được dưới dạng số thập phân hữu hạn nên b chỉ có ước nguyên tố là 2 và 5.

Do đó, b ∈ {2; 25; 50}.

- Với b = 2 thì a = 3150:2 = 1575

- Với b = 25 thì a = 3150:25 = 126

- Với b = 50 thì a = 3150:50 = 63

Vậy các phân số phải tìm là:

1/3=1/12+1/4

Các phân số thỏa mãn:1/9,2/8,3/7,4/6

mik không biết xin lỗi nhưng tặng bạn

1: 3/8,2/12,1/24,4/6

     Vậy có 10 phân số

2:tử số là:

      (17+5):2=11

   Mẫu số là:

       11-5=6

Phân số đó là:11/6

kết quả là 11/6 nhé

cho mình sửa đề bài. viết đc dưới dạng stp hữu hạn nha

13/35=1/5+1/7+1/35           17/63=1/7+1/9+1/63

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mạng tui 999+ rùi đừng hỏi nữa tui ko bít làm nha