8. Given that \( \sqrt[3]{9^{4}}=3^{n} \), find the value of \( n \)

(i) You are given that \( y \) is inversely proportional to \( \sqrt{x} \). \( y=65 \) when \( x=51.84 \). Find an expression for \( y \) in terms of \( x \).

If \( a^{2} b^{2}+49=14 a b \), prove that \( : a \propto \frac{1}{b} \)

2) Rendre le dénominateur entier des nombres \( x \) et \( y \) : \[ x=\frac{11}{\sqrt{3}} \text { et } y=\frac{\sqrt{3}}{\sqrt{3}-2} \text { puis calculer } x+y \]

Identifiez le degré du polynôme \( x^{2}y^{5} - 2xy^{2} + 3 \).

If \( b \) is the middle proportional between \( a \) and \( c \), prove that \( : \frac{a^{2}}{b^{2}}+\frac{b^{2}}{c^{2}}=\frac{2 a}{c} \) If \( y \) varies inversely as \( x \), and \( y=10 \) when \( x=3 \)