Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
Find common elements in matrix rows
find the maximum element of the matrix
Swap two numbers
Calculate the number of elements in a matrix.
NaN (欠損値) が含まれている行を削除しよう
Get the mean digit
Double the next!
Get the value 100
Alternating 1´s and 0´s in a matrix
Say type of roots in quadratic equation
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