1 \startsection[title={Elements d'un gràfic}]
3 \startsubject[title={Preguntes}]
5 \startexercici[reference=exer:elements-grafic-1] Calculeu \startitemize[a, text] \item el domini de definició, \item els intervals de creixement i decreixement, \item els màxims i mínims, \item punts de talls amb els eixos, \item continuïtat i \item simetries \stopitemize dels gràfics següents:
8 \startplacetable[location={split,force,none,width=fit}, reference=taula:combinations2, title={Relacions: funcions o no}]
10 \bTABLE[frame=off,align={middle, lohi},split=yes]
15 { \starttikzpicture[scale=0.4]
16 \draw[very thin,color=gray] (-3,-3) grid (3,4);
17 \draw[->] (-0.2,0) -- (4.2,0) node[right] {$x$};
18 \draw[->] (0,-0.2) -- (0,3.2) node[above] {$y$};
20 \draw[domain=-2:2, variable=\x, color=blue, ultra thick] plot({\x}, {floor(\x)+1});
26 { \starttikzpicture[scale=0.4]
27 \draw[very thin,color=gray] (-3,0) grid (4,3);
28 \draw[->] (-2.2,0) -- (4.2,0) node[right] {$x$};
29 \draw[->] (0,-0.2) -- (0,3.2) node[above] {$y$};
31 \draw[ultra thick] (-2,0) -- (0,2) -- (2,0) --(4,2);
37 { \starttikzpicture[scale=0.6]
38 \draw[very thin,color=gray] (-4,-2) grid (4,2);
39 \draw[->] (-4.2,0) -- (4.2,0) node[right] {$x$};
40 \draw[->] (0,-1.2) -- (0,1.2) node[above] {$y$};
42 \draw[domain=-4:4, variable=\x, color=orange, ultra thick] plot({\x}, {sin(abs(\x) r)});
50 { \starttikzpicture[scale=0.6]
51 \draw[very thin,color=gray] (-4,-1) grid (4,1);
52 \draw[->] (-4.2,0) -- (4.2,0) node[right] {$x$};
53 \draw[->] (0,-1.2) -- (0,1.2) node[above] {$y$};
55 \draw[domain=-4:4, variable=\x, color=orange, ultra thick] plot({\x}, {sin(\x r)});
61 { \starttikzpicture[scale=0.4]
62 \draw[very thin,color=gray] (-2,0) grid (2,9);
63 \draw[->] (-0.2,0) -- (4.2,0) node[right] {$x$};
64 \draw[->] (0,-0.2) -- (0,3.2) node[above] {$y$};
66 \draw[domain=-2:2, variable=\x, color=blue, ultra thick] plot({\x}, {exp(\x)});
72 { \starttikzpicture[scale=0.7]
73 \draw[very thin,color=gray] (-2,0) grid (3,4);
74 \draw[->] (-2.2,0) -- (3.2,0) node[right] {$x$};
75 \draw[->] (0,-0.2) -- (0,3.2) node[above] {$y$};
77 \draw[color=green!70,ultra thick] (-1,0) parabola[bend pos=0.5] bend +(0,2) + (3,0);
85 { \starttikzpicture[scale=0.6]
86 \draw[very thin,color=gray] (-4,-1) grid (4,4);
87 \draw[->] (-4.1,0) -- (4.1,0) node[right] {$x$};
88 \draw[->] (0,-0.2) -- (0,1.2) node[above] {$y$};
90 \draw[domain=-4:4, variable=\x, color=red!70, very thick,smooth] plot({\x}, {abs(cos(\x r)) -1});
96 { \starttikzpicture[scale=1]
97 \draw[very thin,color=gray] (-1,-1) grid (1,1);
98 \draw[->] (-1.2,0) -- (1.2,0) node[right] {$x$};
99 \draw[->] (0,-1.2) -- (0,1.0) node[above] {$y$};
101 \draw[domain=-1:1, variable=\x, color=red!70, very thick] plot({\x}, {- \x/2});
107 {\starttikzpicture[scale=0.5]
108 \draw[very thin,color=gray] (-3,0) grid (3,3);
109 \draw[->] (-4,0) -- (4,0) node[right] {$x$};
110 \draw[->] (0,-0.2) -- (0,4.0) node[above] {$y$};
112 \draw[ultra thick] (-3,1) -- (-2,1);
113 \draw[ultra thick] (-2,2) -- (-1,2);
114 \draw[ultra thick] (-1,3) -- (1,3);
115 \draw[ultra thick] (2,2) -- (3,1);
123 \externalfigure[figs/funcions-elements-grafic-1.pdf][scale=400]
128 \externalfigure[figs/funcions-elements-grafic-2.pdf][scale=400]
133 \externalfigure[figs/funcions-elements-grafic-3.pdf][scale=400]
140 \starttikzpicture[scale=0.6]
141 \draw[very thin,color=gray] (-0.1,-0.1) grid (6.2,5);
142 \draw[->] (-0.2,0) -- (6.2,0);
143 \draw (3,-1) node {$\text{Edat d'una ovella (anys)}$};
144 \draw[->] (0,-0.2) -- (0,5.2) node[above] {$\text{Alçada (cm)}$};
146 \foreach \x in {1,...,6}
148 \draw (\x, -0.1 cm) -- (\x, 0.1 cm);
149 \draw (\x, -0.3 cm) node {$\x$};
152 \draw (-0.1 cm,1) -- (0.1 cm,1);
153 \draw (0,1) node[anchor=east] {$20$};
155 \draw (-0.1 cm,2) -- (0.1 cm,2);
156 \draw (0,2) node[anchor=east] {$40$};
158 \draw (-0.1 cm,3) -- (0.1 cm,3);
159 \draw (0,3) node[anchor=east] {$60$};
161 \draw (-0.1 cm,4) -- (0.1 cm,4);
162 \draw (0,4) node[anchor=east] {$80$};
164 \draw (-0.1 cm,5) -- (0.1 cm,5);
165 \draw (0,5) node[anchor=east] {$100$};
168 \draw[domain=0:6, variable=\x, color=blue, ultra thick] plot({\x}, {2+ sqrt(\x)});
175 \starttikzpicture[scale=0.6]
176 \draw[very thin,color=gray] (-4,0) grid (4,2);
177 \draw[->] (-4.2,0) -- (4.2,0) node[right] {$x$};
178 \draw[->] (0,-0.7) -- (0,1.7) node[above] {$y$};
180 \draw[domain=-4:0, variable=\x, color=orange, ultra thick] plot({\x}, {0.5+ sin(\x r)});
181 \draw[domain=1:4, variable=\x, color=orange, ultra thick] plot({\x}, {0.5});
187 \starttikzpicture[scale=0.6]
188 \draw[very thin,color=gray] (-0.1,-0.1) grid (6.2,5);
189 \draw[->] (-0.2,0) -- (6.2,0);
190 \draw[->] (0,-0.2) -- (0,5.2);
192 \foreach \x in {1,...,6}
194 \draw (\x, -0.1 cm) -- (\x, 0.1 cm);
195 \draw (\x, -0.3 cm) node {$\x$};
198 \draw (-0.1 cm,1) -- (0.1 cm,1);
199 \draw (0,1) node[anchor=east] {$20$};
201 \draw (-0.1 cm,2) -- (0.1 cm,2);
202 \draw (0,2) node[anchor=east] {$40$};
204 \draw (-0.1 cm,3) -- (0.1 cm,3);
205 \draw (0,3) node[anchor=east] {$60$};
207 \draw (-0.1 cm,4) -- (0.1 cm,4);
208 \draw (0,4) node[anchor=east] {$80$};
210 \draw (-0.1 cm,5) -- (0.1 cm,5);
211 \draw (0,5) node[anchor=east] {$100$};
214 \draw[domain=-0.2:6, variable=\x, color=blue, ultra thick] plot({\x}, {5- \x});
227 \startsubject[title={Solucions}]