Tunjukkan masing-masing selang berikut pada garis real ! a. (5, 1) b. (-5, 2] c. [2, ∞ )

[tex]
\text{a. } \(5,1\)=\{x\in R \mid -5<x<1\}\\
\text{b. } \(-5,2\]=\{x\in R\mid -5<x\leq 2\}\\
\text{c. } \[2,\infty\)=\{x\in R \mid x\geq 2\}
[/tex]