Compute the n-th Fibonacci Number
f(0) = 0,
f(1) = 1,
f(2) = 1,
f(3) = 2, ...
f(42) = 267914296
This solution returns f(0) = 1, which contradicts the decription of the given problem.
This solution uses filter from the Signal Processing Toolbox.
Yes, it uses filter, but filter is indeed not a toolbox function, but a built-in function. You can fix the error by changing f=y(n-2) to f = y(n)
... and then change first input of filter to [1,-1] and remove +1 from the end of the line.
Test suite is flawed. I had to add a round(x,0) function to the output to make it pass.
Test is correct. Fibonacci Numbers are integers, so your output should be to.
Remove the polynomials that have positive real elements of their roots.
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