Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
radius of a spherical planet
Compare two input matrices
Sum of the Matrix Elements
Area of square
Approximate the inverse tangent by power series
Say type of roots in quadratic equation
Ratio between sum of primes and sum of factors
Alternating 1´s and 0´s in a matrix
Ratio between sum of primer numbers and non-prime numbers
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