Re: Plot results not right
- To: mathgroup at smc.vnet.net
- Subject: [mg89921] Re: Plot results not right
- From: Helen Read <hpr at together.net>
- Date: Tue, 24 Jun 2008 03:31:27 -0400 (EDT)
- References: <g3nhbc$g6$1@smc.vnet.net>
- Reply-to: HPR <read at math.uvm.edu>
BrenB 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.
The trouble is that Mathematica by default returns a complex root (in
this case cube-root) of a negative number.
> Is there another way to enter this equation into Mathematica to get
> the correct graph results?
This will work.
Plot[2 x - 3 (x^2)^(1/3) + 4, {x, -1, 6}]
--
Helen Read
University of Vermont