Question

tìm số tự nhiên a thỏa mãn :

(5/3+3/4):(7/2-9/4)<a<7/2-1/2

Answer 1

\(\frac{\frac{5}{3}+\frac{3}{4}}{\frac{7}{2}-\frac{9}{4}}< a< \frac{7}{2}-\frac{1}{2}\)

\(\Rightarrow\frac{\frac{29}{12}}{\frac{5}{4}}< a< \frac{6}{2}\)

\(\Rightarrow\frac{29}{15}< a< 3\)

\(\Leftrightarrow\hept{\begin{cases}1< \frac{29}{15}>2\\a< 3\end{cases}}\)

\(\Rightarrow a=2\)

Answer 2

Sửa lại : \(1< \frac{29}{15}< 2\)