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Help plotting 2 functions on Maple 13

  1. Sep 29, 2009 #1
    1. I have 2 problems in which I'm asked to plot a function using maple(sorry i don't know latex yet):

    a. f(x)=[x^3-1]/[sqrt(x)-1] - find the lim x->1
    Here i recieve an empty graph for some reason... :(

    b. f(x)=[tan(3x)]/[tan(5x)] - find the lim x->0
    When i attempt to plot this graph, i recieve the message: "Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct" no matter how much i tweak the domain of the plot.

    Why can't I plot these functions??





    2. Maple commands used (f=function, a=lowest x value, b=highest x value)

    plot(f,x=a..b);




    3.

    a. I've used a table of values to estimate that lim x->1 is equal to 6


    b. I've used a table of values to estimate that lim x->0 is equal to 3/5
     
  2. jcsd
  3. Sep 29, 2009 #2
    For (a) I entered the command:

    plot((x^3-1)/(sqrt(x)-1), x = 0 .. 10)

    into Maple (version 11) and it plotted okay. Are you inputting "f" or the actual function? Did you define f with "f:="? When I entered either function into Maple with the square brackets it didn't work. It did work fine without them though. By a brief look at the help files, "plot" with square brackets is for parametric equations, so probably not what you're looking for.
     
  4. Sep 29, 2009 #3
    Oh. Maybe it's because I was using Maple v.13. I'll retry on v.11.
     
  5. Sep 29, 2009 #4
    I haven't used Maple 13, but it seems very unlikely to me that it can't plot. So you should be able to plot a graph in it, even if the language isn't the same as in v11. Did you try it in v13 with round brackets () instead of square []?
     
  6. Oct 1, 2009 #5
    K its working perfectly now that I used the round parenthesis instead of square! Thx mathie, won't make that mistake again!
     
  7. Oct 1, 2009 #6
    Great! Good luck with the rest of your work.
     
  8. Oct 2, 2009 #7
    If you don't have to use Maple (like for homework or something), then I would suggest using Wolfram Alpha. For example, your first function's graph would be inputted something like http://www.wolframalpha.com/input/?i=plot+(x^3-1)/(sqrt(x)-1)+from+0+to+3". Being online, it's always available and can interrupt what you type, so you don't have to be as strict with syntax.
     
    Last edited by a moderator: Apr 24, 2017
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