nomor 10 jawab yg benar

Dik :
[tex]f(x) = \frac{ - 2x - 5}{3x - 2} [/tex]

[tex] {f}^{ - 1} (x) = \frac{2x - 5}{3x + 2} [/tex]
Dituker posisi -2x sama -2 (operasinya juga di tuker - jadi +)

[tex] {f}^{ - 1} (1) = \frac{2x - 5}{3x + 2} [/tex]

[tex] = \frac{2(1) - 5}{3(1) + 2} [/tex]

[tex] = \frac{2 - 5}{3 + 2} [/tex]

[tex] = \frac{ - 3}{5} [/tex]

[tex] = - \frac{3}{5} [/tex]