Re: Plot results not right

*To*: mathgroup at smc.vnet.net*Subject*: [mg89922] Re: Plot results not right*From*: sashap <pavlyk at gmail.com>*Date*: Tue, 24 Jun 2008 03:31:38 -0400 (EDT)*References*: <g3nhbc$g6$1@smc.vnet.net>

On Jun 23, 1:54 am, BrenB <GoogleGro... at ebesser.com> wrote: > I'm new to Mathematica. > > I'm studying Calculus, and I'm trying to reproduce, in Mathematica, > the graph results of an equation in my book. > > Plot[2 x - 3 x^(2/3) + 4, {x, -1, 6}] > > The output graph is correct, except there should be graphing in the > 2nd and 3rd quadrant, and there is none. > > Is there another way to enter this equation into Mathematica to get > the correct graph results? Plot[2 x - 3 (x^2)^(1/3) + 4, {x, -1, 6}] The reason for parts of the plot not showing in your original input can be seen from evaluating In[6]:= (-1)^(2/3) // N Out[6]= -0.5 + 0.866025 I Since this is not a real number, Plot simply discarded this, and other x<0 points. Oleksandr Pavlyk > > Thanks