8
advanced-math

Which inequality has the solution 2<x<2-2 < x < 2?

A

x2<4x^2 < 4

B

x2>4x^2 > 4

C

x2<2x^2 < 2

D

x2>4x^2 > -4

Correct Answer: A

Choice A is the correct answer. The interval 2<x<2-2 < x < 2 represents values between -2 and 2.

  1. This corresponds to x<2|x| < 2.
  2. Squaring both sides gives x2<4x^2 < 4.

Choice B is incorrect because solution is outside interval (x>2x>2 or x<2x<-2). Choice C is incorrect because boundary is 2\sqrt{2}. Choice D is incorrect because solution is all reals.