I didn't understand the concept of using a modulus in problems ...can anyone plz explain t

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Blazing goIITian

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Dude, u cud have asked me on orkut!!!

Coming to your question, modulus is actually the "distance of a number from the origin"... ie The magnitude of a number...

Take a positive real number, 5, its distance from origin is 5 units, so |5|=5

Now a negative real number, -5... its distance from origin is also 5 units, so |-5|=5

So basically for a real number, just strip off the sign!

U can define it as: |x| = x, if x≥0

= -x, if x<0

For a complex number, say 3+4i, use pyth theorem to find the distance from the origin. it is 5 units, so |3+4i|=5

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