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Hi just wondering why my Inverse of matrix will not compute? I don't believe its wrapped from //MatrixForm because I copied it by hand into a new document and it still would not work.

Any ides?enter image description here

m2 = {{1, 1, 1, 1}, {0, Exp[L], Exp[0*L], Exp[0*L]}, {-1, 1, 0, 0}, {0, Exp[L], 0*Exp[-w2*L], 0*Exp[w2*L]}} Y = {0, f, 0, 0} c = Inverse[m2].Y

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    $\begingroup$ The error says your matrix is singular... this means there is no inverse. $\endgroup$ – bill s Jun 30 '19 at 2:21
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    $\begingroup$ And why would you keep in terms such as Exp[0 * L]? $\endgroup$ – David G. Stork Jun 30 '19 at 3:13
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Looking at it in MatrixForm you'll see that you have two columns that are identical, and therefore the matrix is rank deficient and not invertible.

$$ \left( \begin{array}{cccc} 1 & 1 & 1 & 1 \\ 0 & e^L & 1 & 1 \\ -1 & 1 & 0 & 0 \\ 0 & e^L & 0 & 0 \\ \end{array} \right) $$

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