Answer
a)False
b)True
c)False
d)True
e)True
f)True
Work Step by Step
a. False. See the paragraph following equation (3). The text calls Ax = b a matrix equation.
b. True. See the box before Example 3.
c. False. See the warning following Theorem 4.
d. True. See Example 4.
e. True. See parts (c) and (a) in Theorem 4.
f. True. In Theorem 4, statement (a) is false if and only if statement (d) is also false.
