Question

\(S=\frac{1}{2}:\frac{3}{2}:\frac{4}{3}:\frac{5}{4}:\frac{6}{5}:\frac{7}{6}:\frac{8}{7}:\frac{9}{8}:\frac{10}{9}\)

Answer 1

\(S=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}.\frac{6}{7}.\frac{7}{8}.\frac{8}{9}.\frac{9}{10}\)

\(S=\frac{1}{10}\)

học tốt 

Answer 2

S=\(\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.......\frac{9}{10}\)

S=\(\frac{1.2.3....9}{2.3.4...10}=\frac{1}{10}\)

Vậy S=\(\frac{1}{10}\)

Answer 3

\(S=\frac{1}{2}:\frac{3}{2}:\frac{4}{3}:\frac{5}{4}:\frac{6}{5}:\frac{7}{6}:\frac{8}{7}:\frac{9}{8}:\frac{10}{9}\)

\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}.\frac{6}{7}.\frac{7}{8}.\frac{8}{9}.\frac{9}{10}\)

\(=\frac{1.2.3.4.5.6.7.8.9}{2.3.4.5.6.7.8.9.10}\)

\(=\frac{1}{10}\)

Answer 4

KQ: 1/10

t.i.c.k nha