If |a| denotes the absolute value of an integer, then which of the following are correct? I. |ab|=|a||b| II. |a+b|\leq|a|+|b| III. |a-b|\geq|a|-|b| Select the correct answer using the code given below. [NDA II 2017]

Correct Answer is : 1, 2, and 3

UPSC NDA 2 2017 Mathematics Solved Paper

Question : 9 of 120

Marks: +1, -0

If |a| denotes the absolute value of an integer, then which of the following are correct?
I. |ab|=|a||b|
II. |a+b|≤|a|+|b|
III. |a−b|≥|a|−|b|
Select the correct answer using the code given below.

[NDA II 2017]

1 and 2 only
2 and 3 only
1 and 3 only
1, 2, and 3

Validate

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