j_shreyans wrote:If v≠0, is |w|<|v|?
(1) w/v<1
(2) w^2/v^2<1
Since an absolute value must be NONNEGATIVE, we can safely rephrase the question stem by squaring both sides:
(|w|)² < (|v|)²
w² < v².
Question stem, rephrased:
Is w² < v²?
Statement 1: w/v < 1
If w=0 and v=1, then w² < v².
If w=-1 and v=1. then w² = v².
INSUFFICIENT.
Statement 2: w²/v² < 1
Since v≠0, we know that v²>0, implying that we can safely multiply each side by v²:
(w²/v²) * v² < 1 * v²
w² < v².
SUFFICIENT.
The correct answer is
B.
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