Return x by differentiating it.
I'm confused by this problem. It requires the use of diff() and asks for differentiation, but it tests for equality with the input variable...
the author had proposed lots of questions with meaningless test. i despise this behavior
Right and wrong
First non-zero element in each column
Back to basics 23 - Triangular matrix
Length of the hypotenuse
Test Problem; Create a 5x5 array containing all ones
Probabilities - More brains than luck
Simple polynomial evaluation
Find the diagonal of the square of side L
Probabilities - Balls and urns - 02
Non trivial identities - flipping
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