Simplify: \[ \left(2 x^{5}\right)\left(-5 x^{4}\right) \] Answer Atrempticutof a \( \square \)

b) \( 2 x y-1=5 \) f) \( 3 x x-1=8 \)

\[ S_{n}=-6+2+10+18+\ldots \] to \( n \) terms. 1. We can find an expression for the general term of the series in the form \( T_{k}=b k+c \). What are the values of \( b \) and \( c \) ? Answer: 1. \( b= \)

vantes: \( A(x)=x^{3}+x^{2}+x-3 \) \( B(x)=(2 x+1)^{3}-(x+1)^{3} \) \( C(x)=8 x^{3}-1+4(2 x-1) \) \( D(x)=9 x^{2}-4-7(3 x-2)(x+1) \) Exercice \( 34: \) Soit \( a \) et \( b \) deux noml non nuls. Calculer \( a^{-2} b\left(a^{2} b^{-1}\right)^{4} a^{-3} b^{2} \)

23. Find the equation of a line. Whose intercepts on \( x \) and \( y \) axis are 4 and -6 .

\( \left\{ \left. \begin{array} { l } { a - 5 < 2 a + 3 } \\ { 3 a - 2 < a - 6 } \end{array} \right. \Rightarrow a \in ? \right. \)