7. Evaluate, if possible. If not possious, explain why. \( \begin{array}{ll}\text { a) }(-8)^{\frac{2}{3}} & \text { b) } 625^{\frac{3}{4}} \\ \text { c) }(-256)^{\frac{5}{4}} & \text { d) }\left(\frac{4}{49}\right)^{\frac{3}{2}}\end{array} \)

Exencice 1 - POLynesie 2001 Calculer le nombre B en détaillant les calculs. \[ B=\frac{10^{7} \times 10^{-3}}{10} \] On donnera le résultat sous la forme \( 10^{n} \).

Simplify the cube root. \[ \sqrt[3]{-27} \]

Simplify the cube root. \[ \sqrt[3]{1331} \]

A. \( \frac{3}{5}+\frac{7}{11}=\frac{\square}{55} \)

1) \( f(x)=\log _{2} \quad x+2 \) 2) \( f(x)=\log _{2} \quad x-1 \) 3) \( f(x)=\log _{2} \quad x+3 \) 4) \( f(x)=\log _{2}(x+2) \) 5) \( f(x)=\log _{2}(x-2) \) 6) \( f(x)=\log _{2}(x-5) \)