$8.-Dadas$ las siguientes funciones (viendo su ecuación) determinar si $sOn$ continuas o discontinuas (y si $eS$ el caso para que valores lo $son\right)$ $A\right)f\left(x\right)=\dfrac {1} {3x^{2}-27}$ $1$ $B\right)g\left(x\right)=\bar{2-x} $ $C\right)h\left(x\right)=x^{3}+3x^{2}+3x+1$ $D\right)p\left(x\right)=\dfrac {15x^{2}+12x} {3}$ $E\right)q\left(x\right)=\dfrac {2} {9x^{2}+36}$ $F\right)r\left(x\right)=\dfrac {4x^{2}-1} {2x-1}$ $G\right)s\left(x\right)=\dfrac {2x-5} {3-x}$ $H\right)f\left(x\right)=\dfrac {2t^{2}-t} {t}$ $l\right)g\left(x\right)=\sqrt{x^{4}-2x^{2}+1} $ $J\right)h\left(x\right)=\dfrac {x-3} {x^{2}-x+3}$ $K\right)p\left(x\right)=\dfrac {3x+9} {9x^{2}-81}$ $L\right)q\left(x\right)=\dfrac {64x^{3}-8} {4x+2}$