Solutions to Concepts Test for Chapter 7

Problem	Answer	Comment
1	False	do not forget about x=0
2	True
3	True
4	False	Some horizontal lines may not intersect the graph.
5	True	The exponential function is defined for all real numbers.
6	False	Read the problem carefully!
7	False	Read the problem carefully!
8	True
9	True
10	False	Read the problem carefully!
11	True	The logarithm is an increasing function.
12	False	True only when ln x > 0, i.e., x > 1.
13	True	exp(x) > 0 for all real numbers x.
14	True	The exponential is an increasing function.
15	True	Worked in class.
16	True
17	False	Read the problem carefully!
18	True	Use properties of logarithms.
19	True
20	True	The key is that exp( g(x[0]) ) > 0.
21	False	Problem given on Quiz 3.
22	False
23	True
24	False	arcsin is defined only for x in [ -1, 1 ]
25	True
43	False	This limit equals e

If you have any questions, please send e-mail to meade@math.sc.edu

Last modified: 10 September 2003