What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Least common multiple of many numbers
2 b | ~ 2 b
Reverse the elements of an array
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Find the next state of a JK Flip-Flop
Solve Linear equations
Find the mode of the given input
Find out Harmonic mean.
Find out value of polynomial at different value.
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