Multiple Choice Questions on For any two real numbers a and b ........ for CDS Exam Preparation

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Multiple Choice Questions

For any two real numbers a and b ........

Quantitative Aptitude (CDS) Number System
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    For any two real numbers a and b

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

    always 0

    Incorrect Answer

    never 0

    Incorrect Answer

    positive only if a \not= b

    Correct Answer

    positive if and only if a>b

    Incorrect Answer
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    Explanation:

    for\: the\: equation \sqrt{(a-b)^{2}+(b-a)^{2}}\:
    Where a and b are real numbers,
    The roots of number is always positive and hence it can be zero only at a=b
    So the above equation is positive only when a=b

    By: Munesh Kumari
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