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Homework Help: Matlab Need Help

  1. Mar 28, 2012 #1
    Matlab Need urgent Help

    1. The problem statement, all variables and given/known data
    Create an appropriate vector 'x' and verify the equality of Right and Left hand sides of the expressions given above.


    2. Relevant equations

    Doing this by a/A=1 & b/B=1

    3. The attempt at a solution

    What i have done so far. But keep on getting this error at the bottom. Any help would be great


    >> syms x
    >> x=-10:1:10;
    >> A=log(x+sqrt(x.^2.+1))

    A =

    Columns 1 through 13

    -2.9982 -2.8934 -2.7765 -2.6441 -2.4918 -2.3124 -2.0947 -1.8184 -1.4436 -0.8814 0 0.8814 1.4436

    Columns 14 through 21

    1.8184 2.0947 2.3124 2.4918 2.6441 2.7765 2.8934 2.9982

    >> B=log(x+sqrt(x.^2.-1))

    B =

    Columns 1 through 6

    -2.9932 + 3.1416i -2.8873 + 3.1416i -2.7687 + 3.1416i -2.6339 + 3.1416i -2.4779 + 3.1416i -2.2924 + 3.1416i

    Columns 7 through 12

    -2.0634 + 3.1416i -1.7627 + 3.1416i -1.3170 + 3.1416i 0 + 3.1416i 0 + 1.5708i 0

    Columns 13 through 18

    1.3170 1.7627 2.0634 2.2924 2.4779 2.6339

    Columns 19 through 21

    2.7687 2.8873 2.9932

    >> a;
    ??? Undefined function or variable 'a'.

    >> A;
    >> a=(exp(x)-exp(-x))/2;
    >> b=(exp(x)+exp(-x))/2;
    >> inv(a)
    ??? Error using ==> inv
    Matrix must be square.
     
  2. jcsd
  3. Mar 28, 2012 #2
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