Example 3
LOGIC
If you encounter a logic question, it is likely that about all you’ll have to know
is the so-called contrapositive. That’s what Example 4 is getting at.
Example 4
To multiply complex numbers, use FOIL. (Review chapter 4 if you
forgot what FOIL stands for. It’s a way of remembering the order of
operations for multiplying binomials: first, outer, inner, last.) Just
remember again to take that extra step of changing i^2 to −1:
The answer is (A).
1.
1. “If p, then q” is logically equivalent to which of the following?
I. If q, then p.
II. If not p, then not q.
III. If not q, then not p.
(A) I only
(B) III only