Vastausluku

Vastausluku, also known as the reciprocal, is a mathematical concept that refers to the multiplicative inverse of a given number. For any non-zero number 'a', its vastausluku is '1/a'. This means that the product of a number and its vastausluku is always 1. For example, the vastausluku of 5 is 1/5, and their product is 5 * (1/5) = 1.

In the context of fractions, the vastausluku of a fraction 'a/b' is 'b/a'. This is because the reciprocal of a fraction is found by flipping the fraction upside down. For instance, the vastausluku of 3/4 is 4/3.

The concept of vastausluku is fundamental in various areas of mathematics, including algebra, calculus, and number theory. It is also used in everyday life, such as in calculating rates, ratios, and proportions. For example, if a recipe calls for 1/2 cup of sugar and you want to double the recipe, you would multiply the vastausluku of 1/2 (which is 2) by 2 to get 4, meaning you need 1 cup of sugar.

In summary, vastausluku is a simple yet powerful mathematical tool that has wide-ranging applications in both theoretical and practical contexts.