Question

Tính hợp lý nếu có thể

\(\frac{3}{4}\).\(\frac{8}{9}\).\(\frac{15}{16}\).\(\frac{2499}{2500}\)

Answer 1

=\(\frac{3}{2\cdot2}\cdot\frac{2\cdot4}{3\cdot3}\cdot\frac{3\cdot5}{4\cdot4}\cdot...\cdot\frac{49\cdot51}{50\cdot50}\)

=\(\frac{\left(2\cdot3\cdot...\cdot49\right)\cdot\left(3\cdot4\cdot...\cdot51\right)}{\left(2\cdot3\cdot4\cdot...\cdot50\right)\left(2\cdot3\cdot4\cdot...\cdot50\right)}\)

=\(\frac{51}{50\cdot2}=\frac{51}{100}\)

Answer 2

sai đè rồi bạn Hoàng Nguyễn Văn.ko hề có dấu 3 chấm.Chỉ là\(\frac{3}{4}\).\(\frac{8}{9}\).\(\frac{15}{16}\).\(\frac{2499}{2500}\)thôi

Answer 3

ờ nhầm Xin lỗi