Question

- 9 f ( 1/3 f) + 2/3

Answer 1

`→- 9f( (1)/(3f)) + (2)/(3) \\= - 9( (1)/(3) ) + (2)/(3) \\=-(9)/(3)+(2)/(3) \\=((-9+2))/(3)\\=\boxed{(-7)/(3)}✓`

-7/3 is the right answer.