How do I find the inverse of a #3xx3# matrix?
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"Find the sum of the integers between 2 and 100 which are divisible by 3 ?"
1 Answer
The easiest way to do this to do a reduced row echelon form augmented with an identity matrix:
The inverse matrix is the right square matrix.
There are other ways to compute the inverse matrix, but this method uses an algorithm that you are already familiar with.
