6) (Q. 4 ball.) Quyidagi birhad koeffisiyentini aniqlang: \( \left(3 a^{2} b^{5}\right)^{2} \cdot\left(-5 a^{2} b^{4}\right)^{3} \) \( \begin{array}{llll}\text { A) }-1125 & \text { B) }-45 & \text { C) }-135 & \text { D) }-125 \\ \text { 7) }(\text { B. } 1 \text { ball.) Ko'phadni standart shaklga keltiring: } & \end{array} \)

Exercise 3.17 Determine if each one of the following system of linear equations has unique solution, no solution or infinitely many solutions. \( \begin{array}{ccc}x-y=1 & \text { b. } \begin{array}{c}x+y=1 \\ 2 x+3 y=4\end{array} & \begin{array}{c}x-2 y=1 \\ x+y=5\end{array} \\ \begin{array}{l}\text { a. } \\ x+4 y=2\end{array}\end{array} \)

b. प्रमाणित गर्नुहोस (Prove that): \( \frac{1}{1-\mathrm{x}^{\mathrm{a}-\mathrm{b}}}+\frac{1}{1-\mathrm{x}^{\mathrm{b}-\mathrm{n}}}=1 \)

Si \( a = 4 \), ¿cuál es el valor de \( a^2 \)?

Solve the exponential equation: \( 3^{2x} = 81 \)

a \( \frac{x^{3}-3 x^{2}+5}{x^{2}} \)