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Re: plot
*To*: mathgroup at smc.vnet.net
*Subject*: [mg110710] Re: plot
*From*: Bill Rowe <readnews at sbcglobal.net>
*Date*: Sat, 3 Jul 2010 08:16:36 -0400 (EDT)
On 7/2/10 at 2:57 AM, auguaylupo at gmail.com (agua) wrote:
>Hi With Plot[( (2x+1) Sqrt[x+1] ) / Sqrt[x-1] ,{x,-5,5}] hoped to
>obtain a graph only for x>1.
>What happened? regards.
There is a singularity at x = 1 and your expression isn't real
for -1 < x < 1. If you want to see more of the plot for x>1 add
specify the plot range to be greater. And if you only want to
see the plot for graph for x>1, set the range for x to start at
1. That is
Plot[( (2x+1) Sqrt[x+1] ) / Sqrt[x-1] ,{x,0,5}, PlotRange->{0,100}]
will only show the graph for x>1 and show more of that portion
of the graph.
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