Find the sum, given the first term t1, the common ratio r, and number of terms n.
If input t1=1, r=1, n=7 then output y=7
If input t1=10, r=10, n=5 then output y=111110.
Back to basics 22 - Rotate a matrix
Create a square matrix of multiples
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
How many jokers?
Inner product of two vectors
cos for boss?
Use of regexp
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