Tính (frac{2}{3} times frac{3}{4} times frac{4}{5} times frac{5}{6} times frac{6}{7} times frac{7}{8} times frac{8}{9})
Giải chi tiết:
Ta có: (frac{2}{3} times frac{3}{4} times frac{4}{5} times frac{5}{6} times frac{6}{7} times frac{7}{8} times frac{8}{9} = frac{{2 times 3 times 4 times 5 times 6 times 7 times 8}}{{3 times 4 times 5 times 6 times 7 times 8 times 9}} = frac{2}{9})
Chọn C