Make the following variable:
A 3x4 NaN (Not a Number) matrix
(Hint: use nan)
Test suite check will work for incorrect answers too :(
Filter AC, pass DC
select the primes of a vector
02 - Vector Variables 3
04 - Scalar Equations 2
05 - Vector Equations 3
07 - Common functions and indexing 1
06 - Matrix Equations 1
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