IIT JEE , AIEEE Forum - Mathematics , Algebra

kusum

anybody can answer what is sgn function

shaq_1241

A signum function is one which is defined as follows:

f(x) = |x|/x for x not equal to 0

= 0 for x = 0

it range lies within {0,1,-1) .It therefore returns 0 for 0 input,1 for +ne nos. and -1 for -ve nos.

kousik_paul

Yes kusum answer is Correct.

aysh

Basically,
sng function is given by
f(x)=1{forx>0}
0{forx=0}
-1{for x<0}
Domain=R, Range={-1,0,1}