y=|x| 1st derivative should be +1 x>0 and -1,X<0 f(x) = abs(x) Dx = x.derivative() p1 = plot (f(x),(-5,5),color='black') p2 = plot (Dx, (0,5),color = 'red') p3 = plot (Dx, (-5,0),color = 'blue') show (p1+p2+p3)
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