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
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Get the elements of diagonal and antidiagonal for any m-by-n matrix
Celsius to Kelvin
Weave two vectors into one
Area of an Isoceles Triangle
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Remove collinear points in a set of 2D points defining a polygon
Non trivial identities - flipping
Non trivial identities - summation
Probabilities - Balls and urns - 01
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