If q and r are negative integers, which of the following statements must be true?
I. (-q)^r is positive.
II. (-q)^(-r) is positive.
III. q^(-r) is positive.	Answers.
A) None B) II only C) I and II D) I and III E) I, II and III
Let's q = -2 and r = -3   I. (-q)^r = (2)^(-3) = 1/(2^3) --&gt; Positive   II. (-q)^(-r) is positive. = 2^3 --&gt; Positive   III. q^(-r) is positive. = -2^3 --&gt; Negative   Answer: I and II
<result>C</result>
If q and r are negative integers, which of the following statements must be true?
I. (-q)^r is positive.
II. (-q)^(-r) is positive.
III. q^(-r) is positive.