Determine whether each of the following fund odd, or neither even nor odd \( f(x)=x^{4}+x-1 \) select only one a. neither even nor odd b. odd c. Oeven

VII. Find the solution(s) of the following system. \[ \left\{\begin{array}{r}x_{1}+x_{2}+x_{3}+x_{4}=0 \\ 2 x_{1}+2 x_{2}+3 x_{3}+4 x_{4}=0 \\ 2 x_{1}+2 x_{2}+2 x_{3}+2 x_{4}=0 \\ 3 x_{1}+3 x_{2}+4 x_{3}+5 x_{4}=0\end{array}\right. \]

\( \begin{array}{ll}\text { 1. } 3 x=2 x+18 & \text { 2. } \\ \text { 4. } 4 z+3=6+2 z & \text { 5. } \\ \text { 7. } x=\frac{4}{5}(x+10) & \text { 8. }\end{array} \)

48. If \( a=3-\sqrt{2} \) and \( b=\frac{a+1}{a-1} \) what is the value of \( b \)

What is the greatest natural number \( x \), so that it leaves remainders 8 and 20 when 308 and 200 are divided by \( \times \) respectively.

При каких значениях \( x \) верно, что \( 4 x+8<29 ? \)