tolong di jawab ya kak penting... pake caranya ya kak

f(x)=
[tex]3 (\frac{1}{2} ) - 2\times \frac{2}(\frac{1}{2} ) - 1 [/tex]
[tex] \frac{3}{2} - 2 \times \frac{2}{2} - 1 = - 1[/tex]
maaf kalau salah