(1+4/1×5)x(1+4/2×6)x(1+4/3×7)x…x(1+4/20×24)

0 bình luận về “(1+4/1×5)x(1+4/2×6)x(1+4/3×7)x…x(1+4/20×24)”

1. `text{Đặt A = }` $\dfrac{5}{1 × 5}$ × $\dfrac{5}{2 × 6}$ × $\dfrac{5}{3 × 7}$ × … × $\dfrac{5}{20 × 24}$

   `text{A : 5 × 4 = }` `1 – 1/24 = 23/24`

   `text{A = }` `23/24 : 4 × 5 = 115/96`

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