Mathematics

Mathematics

Problem

The function

s(x)

is defined by

s(x)=\begin{cases}-1,& x<0\\0,& x=0\\1,& x>0\end{cases}

Which parent function does

s(x)

represent? a) Modulus function

|x|

b) Unit step (Heaviside) function

u(x)

c) Signum function

\operatorname{sgn}(x)

d) Greatest integer (floor) function

\lfloor x \rfloor

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