حل اسئلة مراجعة تراكمية

مثل كل دالة فيما يأتي بيانياً.

36)

$f\left(x\right)=\left\{\begin{array}{l}\begin{array}{c}\\ \end{array}\\ \end{array}\right.\begin{array}{rl}x,& x<1\\ 3,& 1\le x\le 3\\ -2x,& x>3\end{array}$

37)

$f\left(x\right)=\left\{\begin{array}{l}\begin{array}{c}\\ \end{array}\\ \end{array}\right.\begin{array}{rl}x+3,& x<-2\\ 2x,& -2\le x\le 2\\ -3x,& x>2\end{array}$

38)

$f\left(x\right)=\left\{\begin{array}{l}\begin{array}{c}\\ \end{array}\\ \end{array}\right.\begin{array}{rl}-2x,& x\le -2\\ x+1,& 0<x\le 6\\ x-5,& x>6\end{array}$

إذا كان $\begin{array}{rl}& f\left(x\right)=4x^2-10x , g\left(x\right)=-3x^2+2 , h\left(x\right)=-7x+8\end{array}$ فأوجد قيمة كل مما يأتي:

39) $f(-9)$

$\begin{array}{rl}-7(-9)+8& =f(-9)\\ 71& =\end{array}$

40) $g(-4)$

$\begin{array}{r}-3(-4{)}^2+2=g(x)\\ -46=\end{array}$

41) $h\left(12\right)$

$\begin{array}{rl}4(12{)}^2-10(12)& =h\left(12\right)\\ 456& =\end{array}\begin{array}{}\end{array}$