Make fMat be a 5x3 matrix of random integers with values from -3 to 3
(Hint: use randi)
Test for randomness could be tightened (cf. Solution 1490988).
2 b | ~ 2 b
Duplicate each element of a vector.
Basic arrays operations.
02 - Vector Variables 5
02 - Vector Variables 3
07 - Common functions and indexing 3
06 - Matrix Equations 2
03 - Matrix Variables 1
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