\n| $g\\left( 2 \\right) = \\frac{2}{5} \\times 2 + \\frac{1}{5} = 1$ e $g\\left( { – 3} \\right) = \\frac{2}{5} \\times \\left( { – 3} \\right) + \\frac{1}{5} = – 1$, logo $C\\left( {2,1} \\right)$ e $D\\left( { – 3, – 1} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $g$.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Como se sabe, o gr\u00e1fico da fun\u00e7\u00e3o $h$ \u00e9 uma par\u00e1bola. Podemos come\u00e7ar por determinar alguns pontos do seu gr\u00e1fico:<\/p>\n \n\n\nComo $$\\begin{array}{*{20}{l}}
\n{h\\left( x \\right) = 0}& \\Leftrightarrow &{4{x^2} – 36x = 0} \\\\
\n{}& \\Leftrightarrow &{4x\\left( {x – 9} \\right) = 0} \\\\
\n{}& \\Leftrightarrow &{\\begin{array}{*{20}{c}}
\n{4x = 0}& \\vee &{x – 9 = 0}
\n\\end{array}} \\\\
\n{}& \\Leftrightarrow &{\\begin{array}{*{20}{c}}
\n{x = 0}& \\vee &{x = 9}
\n\\end{array}}
\n\\end{array}$$ ent\u00e3o $O\\left( {0,0} \\right)$ e $E\\left( {9,0} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $h$.<\/td>\n<\/tr>\n | \n| <\/td>\n<\/tr>\n | \n| $h\\left( { – 2} \\right) = 4 \\times {\\left( { – 2} \\right)^2} – 36 \\times \\left( { – 2} \\right) = 88$ e $h\\left( {11} \\right) = 4 \\times {11^2} – 36 \\times 11 = 88$, logo\u00a0$F\\left( { – 2,88} \\right)$ e $G\\left( {11,88} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $h$.<\/td>\n<\/tr>\n | \n| $h\\left( { – 1} \\right) = 4 \\times {\\left( { – 1} \\right)^2} – 36 \\times \\left( { – 1} \\right) = 40$ e $h\\left( {10} \\right) = 4 \\times {10^2} – 36 \\times 10 = 40$, logo $H\\left( { – 1,40} \\right)$ e $I\\left( {10,40} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $h$.<\/td>\n<\/tr>\n | \n| $h\\left( 2 \\right) = 4 \\times {2^2} – 36 \\times 2 =\u00a0 – 56$ e $h\\left( 7 \\right) = 4 \\times {7^2} – 36 \\times 7 =\u00a0 – 56$, logo $J\\left( {2, – 56} \\right)$ e $L\\left( {7, – 56} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $h$.<\/td>\n<\/tr>\n | \n| $h\\left( 4 \\right) = 4 \\times {4^2} – 36 \\times 4 =\u00a0 – 80$ e $h\\left( 5 \\right) = 4 \\times {5^2} – 36 \\times 5 =\u00a0 – 80$, logo $M\\left( {4, – 80} \\right)$ e $N\\left( {5, – 80} \\right)$ s\u00e3o dois pontos do gr\u00e1fico de $h$.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n | |