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
Extract leading non-zero digit
Solve the set of simultaneous linear equations
Angle between Two Vectors
Matlab Basics - Switching Assignments
Calculate square and cube of number
Performance - summation
Find the diagonal of the square of side L
Non trivial identities - flipping
Simple polynomial evaluation
Probabilities - More brains than luck
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