Find the exact value of the logarithm without using a calculator. \[ \log _{3} 9 \] \( \log _{3} 9=\square \) (Type an integer or a simplified fraction.)

257. Funksiýalaryň grafigini guruň: \( \begin{array}{ll}\text { a) } y=x^{2}+6 x ; & \text { ç) } y=0,5 x^{2}-4\end{array} \)

7. Исследуйте но чётность и нечетность функции а) \( \mathrm{y}=4 \mathrm{x}-2 \mathrm{x}^{3}+6 \mathrm{x}^{5} \quad \); б) \( f(x)=\frac{5}{x^{4}+4 x^{2}} \)

Simplify the expression without using a calculator. \( \ln e^{2}=\square \)

2. \( \frac{1}{\sqrt{3}+\sqrt{2}} \div \frac{1}{\sqrt{4}+\sqrt{3}} \div \frac{1}{\sqrt{5}+\sqrt{4}}= \) ?

Simplify the expression without using a calculator. \( \log _{2} 64= \)