(d) \( \frac{2}{a+1}+\frac{2 a}{a-1}+\frac{a^{2}+3}{1-a^{2}} \) \( 2 a \)

6. \( 1389 k \star<3607 \) Yukarıdaki sıralamaya göre \( \star \) yerine yazı- labilecek rakamları farklı en küçük tek sayı ile rakamları farklı en büyük doğal sayının toplamı kaçtır? \( \begin{array}{ll}\text { A) } 4990 & \text { B) } 4997 \\ \text { C) } 4998 & \text { D) } 5000\end{array} \)

solve the equation \( \frac{a-1}{a}-\frac{2 a+1}{3 a}=2 \)

10. if \( p(x)=3 x^{2} \) And \( q(x)=x^{2}+x \), then what is the solution set of \( \frac{p(x)}{3 q(x)}-\frac{1}{x}=\frac{1}{q(x)} \) A, \( \{-1,2\} \quad \quad \) C, \( \{-3,2\} \) 11. What is the partial decomposition of \( \frac{\left(x^{2}+x+1\right)}{(x+2)\left(x^{2}+1\right)} \) A, \( \frac{\frac{2}{5}(x+2)+(3 x+1)}{5\left(x^{2}+1\right)} \) B, \( \frac{\frac{5}{3}(x+2)+(2 x+1)}{3\left(x^{2}+1\right)} \) C, \( \frac{\frac{3}{5}(x+2)+(2 x+1)}{5\left(x^{2}+1\right)} \) D, \( \frac{\frac{2}{3}(x+2)+(3 x+1)}{3\left(x^{2}+1\right)} \)

If \( n \in \mathrm{n}, \mathrm{n}<\sqrt{26}<\mathrm{n}+1 \), then \( n=\ldots \) The arithmetic mean of the set of values : \( 3-x, 5+x, 4 \) equals

2. Which one of the following is a polynomial function? \( \begin{array}{llll}\text { A. }\left|x^{3}+1\right| & \text { B. } \sqrt{x^{4}-9 x^{2}+9} & \text { C. } \sqrt{x^{4}+10 x^{2}+25}+\frac{3}{\sqrt{5}} & \text { D. } 4^{x}-x^{2}+2 x\end{array} \)