# Exam Exam

1.- Decide which of the following sentences is false

 a) A Cartesian coordinate system specifies each point uniquely b) A Cartesian coordinate system uses a pair of numerical coordinates c) The coordinate axes are a pair of fixed perpendicular lines d) The horizontal axis is called ordinate axis

2.- Which of the following relations is not a function

 a) y2 = x b) The relation that associates each Natural Number with 1 c) y = x2 d) None of them

3.- Decide which is the graph of the function: y = 2x + 1

 a) b) c) d) None of them

4.- The intersection points with axis of the function y = 2x + 1, are:

 a) (1/2,0) and (0,1) b) (1,0) and (0,1/2) c) (1,0) and (0,-1/2) d) (-1/2,0) and (0,1)

5.- The intersection points with axis of the function y = x2 + 1, are:

 a) (0,1),(-1,0) and (1,0) b) (0,1) c) (0,1) and (1,0) d) (0,1),(0,-1) and (1,0)

6.- Decide which of the following sentences is true

 a) There aren't functions which are discontinuous in R b) All the functions are continuous c) There aren't functions whcih are discontinuous in infinite points d) All of them are false

7.- is continuous in

 a) R-{3,6,9} b) R-{3,9} c) R-{3,6} d) R-{6,9}

8.- It is increasing in:

 a) (0,3)U(3,4.5)U(9,∞) b) (0,3)U(3,4.5)U(6,7)U(9,∞) c) (0,3)U(3,4.5)U(6,7.5)U(9,∞) d) None of them

9.- It has a minimum in:

 a) absolute minimum in 0 and relative one in 6 b) absolute and relative minimum in 0 and relative one in 6 c) absolute and relative minimum in 0 d) None of them

10.- It has a maximum in:

 a) Absolute and relative maxima in 4.5 and 7.5 b) Relative maxima in 4.5 and 7.5 c) Absolute maximum in 7.5 and relative one in 4.5 d) None of them