MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply TodayWrite a function that has the following property: f(f(x)) = -x for any numeric array x.

Note that there is no restriction on the output for f(x). How bizarre can you make it?

45 correct solutions
32 incorrect solutions

Last solution submitted on Nov 25, 2014

1 player likes this problem

1 player likes this solution

1 Comment

Andrew Newell
on 15 Aug 2013

Getting a little silly!

1 Comment