The function is called the signum function, or sign(x). It is equal to abs(x)/x
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It is x|x|/2 + C
The absolute value of 19 is 19. If x is positive , absolute x equals x.
zero. The absolute value of a number is just the positive version of that number, so the absolute value of x is x, and x minus x is zero.
If f(x)=1/x then F(x)=antiderivative of f(x)=ln(|x|) (the natural log of the absolute value of x) There's another way of reading this question. The anti derivative of 1 is x+c. Dividing that by x gives you 1 + c/x
I am assuming the you are talking about the graph of the derivative. The graph of the derivative of F(x) is the graph such that, for any x, the value of x on the graph of the derivative of F(x) is the slope at point x in F(x).