\( \begin{array}{lll}\text { (a) }\{2\} & \text { (b) }\{4\} & \log _{2} x+\log _{4} x=3 \text { is } \ldots \ldots\end{array} \)

What does the exponent in an expression indicate?

Determine the value(s) of k for which the equation \( \frac{1}{\mathrm{k}}=\mathrm{x}^{2}-\mathrm{x}+1 \) where \( \mathrm{k} \neq 0 \) has real roots.

Part-II: Fill in the blank space by short answer only (1pt each) 5. What is the negation of; Every student in this class likes mathematics. 6. The GCF and LCM of two numbers are 3 and 180 respectively. If one of the numbers is 12, then the second number is.

Simplify the radical expression: \( \sqrt{50x^2} \)

ExERCICE 3 Inéquation Résoudre dans \( \mathbb{R} \) les inéquations suivantes : \( \begin{array}{lll}\text { 1) } x^{2}+3 x-4 \leqslant 0 & \text { 2) } 7 x-3 \leqslant 2 x^{2} & \text { 3) } \frac{5 x^{2}-3 x}{x^{2}+4 x+3} \geqslant 0\end{array} \)