[tex]a) \: f( \frac{2}{3} ) = 3 \times \frac{2}{ 3} + 10 = 12 \\ raspuns \: 12[/tex]
[tex]b) \: f( 2.5) = - 20 \times 2.5 = - 50 \\ raspuns \: - 50[/tex]
[tex]d) \: f(x) = 100 \\ \sqrt{x} = 100 \\ x = 10000[/tex]
[tex]c) \: f(x) = - 11 \\ \frac{8}{x} = - 11 \\ x = - \frac{8}{11} [/tex]
