UPSC CDS Math Square, Roots and Surds Questions

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Question : 6 of 22

Marks: +1, -0

For any two real numbers a and b, √(a−b)2 + √(b−a)2 is

[2019 CDS-I]

always zero
never zero
positive only if a ≠ b
positive if and only if a > b

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