\(f(3)\)-ро ҳисоб кунед, агар \(f(x)=\frac{x}{7}+\frac{2}{x}-\frac{2}{21}\)

\(f(3)=\frac{3}{7}+\frac{2}{3}-\frac{2}{21}=\)

\(=\frac{9}{21}+\frac{2}{3}-\frac{2}{21}=\)

\(=\frac{7}{21}+\frac{2}{3}=\)

\(=\frac{1}{3}+\frac{2}{3}=\)

\(=\frac{3}{3}=\)

\(=1\)

Ҷавоб: 1