Explanation
This question has an absolute value in it. Algebraic
expressions with absolute values should be analyzed in two cases: one in which
the thing inside the bars is positive, and the other in which it's negative.
Moreover, glancing at the data statements, we can see that both Statements
describe n as negative. So we can
purely ignore the case in which n is
positive. Since we will know that n is
negative, we can simplify:
This is not what we are being told: this is what we are
being asked. But since we know that n is
a negative number,
will always
be positive, and
will always
be negative, so the answer to this question will always be "no." If you're
thinking, "Wait a minute! How did we answer the question without the
statements?" Remember: we did use the statements. It turns out that knowing
that n is negative is enough to
answer the question being asked. Therefore Statements (1) and (2) are
separately sufficient.
The correct answer is (D).
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