The number of all combinations of n things taken r at a time. The nth partial sum is given by a simple formula. Manipulations of these sums yield useful results in areas including string theory quantum mechanics and complex numbers.
Are based on approximating its natural logarithm.
The formula for finding the volume of a box is. As n grows the factorial n. Also if the common ratio is equal to 1then the sum of the GP is given by. R is the common ratio.