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Respective initial value

  1. Mar 30, 2009 #1
    1. The problem statement, all variables and given/known data
    Find the zero for the following equation with the respective initial value...
    a)cos(x)=(e^x)-1,x0=0
    b)ln(x)=x^2-1,x0=1
    c)x^2=2x+2,x0=2.6
    the answers i get are...
    a)0.6931
    b)1
    c)2.7321
    but here comes my question...
    i'm attempting a class teach us to use the software matlab...
    but 2 out of 3 answers that i get from using the software is different from what i count myself...
    the software matlab give me the answers are
    a)0.6013
    b)1
    c)error
    can someone help me??
    please and thank you...

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 30, 2009 #2

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    I assume you are using some kind of iterative method to numerically solve these equations- but what method? Secant method? Newton's method?
     
  4. Mar 30, 2009 #3
    i'm using newton's method...
    is that effect the answers??
     
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