The test suite already spoils the solution.
True. In general that should be avoided, although admittedly it's difficult here because if the correct answer were hard-coded, then changes to: (i) the hardware on which Cody runs; or (ii) the version of MATLAB that Cody employs may eventually invalidate it. Having said that, the Test Suite could still be tightened up (see e.g. Solution 1461085).
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Sum of first n terms of a harmonic progression
Return the first and last characters of a character array
find radius of cone
Create an index-powered vector
Toolbox check part 3
Back to basics 23 - Triangular matrix
Back to basics 20 - singleton dimensions
Back to basics 8 - Matrix Diagonals
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