Question

the range of f(x)= sgn(2^x)+sgn( | x-5 |)=

Answer 1

Answer:

Step-by-step explanation:

As by definition

Sign(x) = { -1 x<0; 1 x>0; 0 x=0

Sign(x) = |x|/x = x/|x|

So similarly

Sign(x^2+1) = |x^2+1|/x^2+1 I.e. |x^2+1|>0

Answer 2

As by definition

Sign(x) = { -1 x<0; 1 x>0; 0 x=0

Sign(x) = |x|/x = x/|x|

So similarly

Sign(x^2+1) = |x^2+1|/x^2+1 I.e. |x^2+1|>0