Maths Olympiad Prep

Library / /21 of 520

Algebra Difficulty 2.2 Junior Find the answer

Given pp: x>2|x| > 2 is a condition for qq: x<2x < -2.

Options:

Pick one

Solution

Analysis of the problem: If x>2|x| > 2, then x2x 2; If x2x 2. Therefore, pp is a necessary but not sufficient condition for qq. Hence, the correct option is C.

Key Points:
1. Solving absolute value inequalities;
2. Sufficient and necessary conditions.

Therefore, the answer is C\boxed{\text{C}}.

Want a route through all this instead of an archive? The track puts 2,000 problems in a working order, from AMC 10 level to the IMO shortlist.

Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic and difficulty added by this site.