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).
Reindex a vector
find radius of cone
06 - Matrix Equations 3
07 - Common functions and indexing 5
Side of an equilateral triangle
03 - Matrix Variables 4
07 - Common functions and indexing 2
06 - Matrix Equations 1
07 - Common functions and indexing 4
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