# What does an exclamation mark mean after the salutation?

## What does an exclamation mark mean after the salutation?

(For the salutation in the letter, cf. also D 132.) An exclamation mark also appears in exclamatory sentences that take the form of a question.

## What does an exclamation mark mean in a formula?

The factorial (sometimes, especially in Austria, also called factorial) is a function in mathematics that assigns the product of all natural numbers (without zero) less than and equal to this number to a natural number. It is abbreviated by an exclamation mark (“! “) following the argument.

## What does 4 over 2 mean?

The English notation is more suggestive: “n choose k”—that is, something is selected, namely (all) k-element subsets. For example, (4 over 2) = 6 because {1,2},{1,3},{1,4},{2,3},{2,4},{3,4} are the two-element subsets from {1,2,3,4}.

## When to use the faculty?

is a notation for the product of all numbers 1 , 2 , 3 , … , n sf 1,2,3,ldots,n 1,2,3,…,n. It is often used in combinatorics because the factorial. n! gives the number of ways to order any set with n elements.

## Why is 0 equal to 1?

Re: Why is the factorial of 0 equal to 1? If I add 1 element to n elements, then the number of possible permutations is multiplied by n + 1. So if I start with 0 elements, the result is 0! = 1

## Why is 0 999 equal to 1?

The repeating decimal 0.999… (also written with more or less nines before the ellipsis or as 0.9 or 0,(9)) denotes the real number 1. So the symbols “0.999…” and “1” represent the same number ( see place value notation).

## Who invented the 0?

The Babylonians, the Maya and also the Indians had invented the zero long before the Europeans had any idea of this number. The zero first reached the European continent in Spain. The Arabs, who then ruled southern Spain, had brought the zero with them from North Africa.

## What is a 1?

The symbol 1 is used as a digit of the place value system. If the number 1 stands alone, it means the “number one” according to the usual interpretation. When writing Roman numerals and binary numbers, the 1 is also drawn as a line in Germany, Austria and Switzerland.

## What does 1 2 mean?

One and a half is a German numeral meaning “one and a half”, i.e. “1.5” or “1 1/2” (“1 ½”) or “one and a half”. The variant “one and a half” is rarer. Here “other” obsoletely means “second”, so that one and a half actually means “the second half” (in the sense of “the second half”).

## What is the scale 1 2?

In some areas (mechanical engineering, electronics, macro photography) not only reductions but also enlargements are defined by specifying a scale. Here, for example, a scale of 2:1 means that the construction drawing or macro photo is twice the size of the real thing.

## What does scale 10 to 1 mean?

The scale describes how much has been reduced or enlarged. A scale is given by the ratio of two numbers. – 1 : 10 means that 1cm on the map is 10cm in reality. – 1 : 100 means that 1cm on the map is 100cm in reality.

## How big is 1 10?

List of model scales Scale millimeters per foot 1:1030.48 mm 1:933.87 mm 1:838.10 mm 1:743.54 mm98

## What does the term scale mean?

Scale, or map scale, is the reduction ratio of maps, plans, relief models, terrain profiles, and globes. It is defined as the ratio of a length on the map (map route) to its correspondence in nature (nature route).

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