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Jakými příkazy lze vykreslit průběh polynomu y = 0.5x3 - 2x v intervalu x=<-5,5> (viz obrázek)?
p = [0.5 0 -2 0];x = -5: .1 : 5;plot (x, p)
p = [0.5 -2];x = -5 : 5;plot (x, polyval(p,x) )
p = x^3 - 2x;x = -5: .1 : 5;plot (x, polyval(p,x) )
p = [0.5 0 -2];x = -5: .1 : 5;plot (x, polyval(p) )
p = [0.5 0 -2 0];x = -5: .1 : 5;plot (x, polyval(p,x) )
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