Question

3/4 x 8/9 x 15/16 x ... x 80/81 x 99/100

Answer 1

Ai biết trả lời nhanh giúp mình mình kết bạn cùng

 

Answer 2

sorry bn nha bài này chịu 

Answer 3

3x1/2x2 x 2x4/3x3 x 3x5/4x4 x....x8x10/9x9 x9x11/10x10

=1/2 x 11/1011/20

Answer 4

\(\dfrac{3}{4}\cdot\dfrac{8}{9}\cdot...\cdot\dfrac{99}{100}\)

\(=\dfrac{1\cdot2\cdot...\cdot9}{2\cdot3\cdot...\cdot10}\cdot\dfrac{3\cdot4\cdot...\cdot11}{2\cdot3\cdot...\cdot10}\)

\(=\dfrac{1}{10}\cdot\dfrac{11}{2}=\dfrac{11}{20}\)