4 Résous dans \( \mathbb{R} \), les équations suivantes: \( \left.\left(x^{2}-1\right) \ln x=0 ; b\right) \ln (x+5)=2 \ln 2-\ln (x-2) ; \) c) \( \ln x=1 \)

19 days of March 2015 . \( \begin{array}{llll}\text { (1) } ₹ 1530 & \text { (2) } ₹ 1260 & \text { (3) } ₹ 1620 & \text { (4) } ₹ 1710\end{array} \) \( x \propto \frac{1}{y} \). When \( y=6, x=14 \). What is the constant of variation ? \( \begin{array}{llll}\text { (1) } 94 & \text { (2) } 84 & \text { (3) } 82 & \text { (4) } 72\end{array} \) If \( x \) varies directly as \( y \), which number will replace the question

\( f(x)=2 x-1 \) and \( g(x)=3 x^{2} \) Find both \( f \circ g \) and \( g \circ f \), stating domain and range of each.

Simplify the expression: \( (x^{1/4}y^{1/2})^{8} \)

Multiply the bino (IIi) \( (x-4) \) and ( \( 2 x \)

act: \( 3 I(I-4 m+5 n) \) from \( 4 I(10 n-3 m+2 l) \) act: \( 3 a(a+b+c)-2 b(a-b+c) \) from \( 4 c(-a+b+c) \)