Tính f(3), f(0),f(-15/16),f(2,7),f(-căn bậc hai của 3)

Ta có: $y=f\left(x\right)=-\frac{2}{3}x$

$•f\left(3\right)=-\frac{2}{3}.3=-2$                      $•f\left(0\right)=-\frac{2}{3}.0=0$        $•f\left(\frac{-15}{16}\right)=-\frac{2}{3}.\frac{-15}{16}=\frac{5}{8}$

$•f\left(2,7\right)=-\frac{2}{3}.\frac{27}{10}=-\frac{9}{5}$        $•f\left(-\sqrt{3}\right)=-\frac{2}{3}.\left(-\sqrt{3}\right)=\frac{2\sqrt{3}}{3}$