A

9000004902

Level: 
A
Find the domain of the function \(f\colon y =\log _{\frac{1} {3} }(9 - x^{2})\).
\(\mathrm{Dom}(f) = (-3;3)\)
\(\mathrm{Dom}(f) =\mathbb{R}\setminus \{3\}\)
\(\mathrm{Dom}(f) = (-\infty ;3)\)
\(\mathrm{Dom}(f) = (3;\infty )\)
\(\mathrm{Dom}(f) = (-\infty ;-3)\cup (3;\infty )\)

9000003702

Level: 
A
In the following list identify a function whose graph passes through the points \([3;0]\) and \([5;3]\).
\(f(x) = \left (\frac{1} {2}\right )^{3-x} - 1\)
\(f(x) = \left (\frac{1} {2}\right )^{3-x} + 1\)
\(f(x) = 1 -\left (\frac{1} {2}\right )^{x-3}\)
\(f(x) = \left (\frac{1} {2}\right )^{x-3} + 1\)
\(f(x) = 1 -\left (\frac{1} {2}\right )^{x+3}\)
\(f(x) = \left (\frac{1} {2}\right )^{x-3} - 1\)