1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Taylor polynom of f(x)=1/(√1-e3x)

  1. May 29, 2016 #1
    • Member warned about posting homework/exam problems with no effort shown
    Hello,

    I can't find solution for Maclaurin (Taylor a=0) polynom of function: f(x)=1/(√1-e3x).

    Could you help me please?
    Thank you so much for help

    Andrea
     
  2. jcsd
  3. May 29, 2016 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    I think something went wrong with formatting. I guess you didn't mean$$f(x) = \frac 1 {\sqrt 1 - e3x}$$
    Is this homework?
     
  4. May 29, 2016 #3
    I'm sorry. I made wrong formattion. The function is in the picture http://file:///C:/Users/nemkv/Desktop/function.JPG [Broken]

    It is from the exams.
     

    Attached Files:

    Last edited by a moderator: May 7, 2017
  5. May 29, 2016 #4

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    I moved the thread to the homework section.
    $$f(x)=\sqrt{1-e^{3x}}$$
    Where did you run into problems?

    Edit: Fixed sign. With minus it is odd.
     
    Last edited: May 29, 2016
  6. May 29, 2016 #5
  7. May 29, 2016 #6

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    The function ##f(x) = \sqrt{1-e^{3x}}## does not have a series expansion in powers of ##x-a## when ##a = 0## (that is, a Maclauren expansion). The function ##f(x)## is real when ##x < 0## but is pure imaginary when ##x > 0##, and there is no way any function like that can have a Maclauren expansion.

    This is either a "trick" question or else you copied it incorrectly.
     
    Last edited by a moderator: May 29, 2016
  8. May 29, 2016 #7
    Thank you so much. I have checked the function and I have copied it correctly. So It really looks like a trick.

    Thanks for your time.
    Best regard

    Andrea
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Taylor polynom of f(x)=1/(√1-e3x)
  1. F(f^-1) = x (Replies: 5)

  2. F^-1 (x) = ? functions (Replies: 1)

Loading...