Page 785 - Elementary_Linear_Algebra_with_Applications_Anton__9_edition
P. 785
(c) , find
(d)
Given that
19.
(a)
(b)
(c)
(d)
20. are 1, −1, i, and .
(a) Show that if n is a positive integer, then the only possible values for
(b) Find .
Hint See Exercise 23(b) of Section 10.1.
Prove:
21.
(a)
(b)
Prove: if and only if z is a real number.
22.
Given that and , find
23.
(a) , then z is either real or pure imaginary.
Prove: If
24.
Pro(vbe) that .
25.
