I'm trying to display a matrix in a problem. This is the code for the matrix:
1 & -2 \
1 & 4
However, when viewing the problem, an image is of a lambda_1. There is
a lamba_1 in another part of the same problem, and that one displays
If one of the entries in the matrix is changed, for example I've
changed the 4 to a 45, then the matrix is displayed fine. If I change
it back to 4 then the image just shows a lambda_1 again.
What can be done to fix this or stop it happening again?
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