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The reciprocal function, the function f(x) that maps x to 1/x, is one of the simplest examples of a function which is its own inverse (an involution). Multiplying by a number is the same as dividing by its reciprocal and vice versa. For example, multiplication by 4/5 (or 0.8) will give the same result as division by 5/4 (or 1.25).
A unit fraction is a positive fraction with one as its numerator, 1/ n. It is the multiplicative inverse (reciprocal) ... For example, the matrix ...
The reciprocal of a proper fraction is improper, and the reciprocal of an improper fraction not equal to 1 (that is, numerator and denominator are not equal) is a proper fraction. When the numerator and denominator of a fraction are equal (for example, 7 / 7 ), its value is 1, and the fraction therefore is improper. Its reciprocal is ...
The fraction 99 / 70 (≈ 1. ... The multiplicative inverse (reciprocal) of the square root of two is a widely used constant, ... For example, the series for ...
The ratio is called coefficient of proportionality (or proportionality constant) and its reciprocal is known as constant of normalization (or normalizing constant). Two sequences are inversely proportional if corresponding elements have a constant product, also called the coefficient of proportionality.
The harmonic mean of a set of positive integers is the number of numbers times the reciprocal of the sum of their reciprocals. The optic equation requires the sum of the reciprocals of two positive integers a and b to equal the reciprocal of a third positive integer c. All solutions are given by a = mn + m 2, b = mn + n 2, c = mn.
For example, America’s top source of the imported metals, Canada, sends $7 billion a year in steel and $9 billion in aluminum to the U.S. That’s just a fraction of the nearly $500 billion in ...
In mathematics, Thiele's interpolation formula is a formula that defines a rational function from a finite set of inputs and their function values ().The problem of generating a function whose graph passes through a given set of function values is called interpolation.