Question

даю 20б. Дана функция y=3u (y=f(u)).

Answer 1

$y=3^u\\\\a)\ \ f(-3)=3^{-3}=\frac{1}{3^3}=\frac{1}{27}\\\\b)\ \ f(0)=3^0=1\\\\c)\ \ f(2)=3^2=9$