Question

The set - builder form of the set $\{\frac{4}{5},\frac{5}{6},\frac{6}{7},\frac{7}{8},\frac{8}{9},\frac{9}{10}\}$ is

• A. $\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4\le n\le 9\}$
• B. $\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4<n<9\}$
• C. $\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4\le n<9\}$
• D. $\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4<n\le 9\}$

Answer 1

The correct option is A

$\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4\le n\le 9\}$

$\{x:x=\frac{n}{n+1},\text{where}nϵN\text{and}4\le n\le 9\}$