For any two real numbers a and b.

$\sqrt{{(a - b)}^{2}} + \sqrt{{(b - a)}^{2}}$ is

A) always zero	B) never zero
C) positive only if a ≠ b	D) positive if an only if a > b

Answer: C) positive only if a ≠ b

Explanation:

Subject: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

For any two real numbers a and b. a-b2+b-a2 is