Základy vysokoškolské matematiky pro beznadějné případy - Mach

ještě snáze, pro úplnost níže předkládám dva grafy výše uvedených funkcí: 
 

  GRAF 1: funkce 

3

9

2

−

−

=

x

x

y

                           GRAF 2: funkce 

3

+

= x

y

 
     y                                                              y 
   8  -                                  f                         8 -                                    f 
 
   7  -                                                            7 - 
 
   6                      o                                       6 

                     + 

 
   5  -                                                            5 - 
 
   4  -                                                            4 - 
 
   3  -                                                            3 - 
 
   2  -                                                            2 - 
 
   1  -                                                            1 - 
 
     0       |      |            |      |      |      |           0       |      |            |      |      |      | 
             1      2     3     4     5      6     7     x            1      2     3     4     5      6      7    x