+9665 sgn(2.5)
= \(\dfrac{2.5}{|2.5|}\\ = 1\)
-1 when x< 0
sgn(x) = undefined when x = 0
1 when x > 0
https://www.desmos.com/calculator/hnpqmpeny5
A graph of sgn(x).
If you didn't ask this question I wouldn't do research about sgn(x)....... Anyways, Thank you!!
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