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)
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,∞)
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
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
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