The $ (dollar sign) symbol is used to represent various forms of currency around the world, most notably the United States dollar. For example, $20 represents twenty dollars. In typesetting, the dollar sign is used to denote the beginning and end of mathematical mode.

∞ is a symbol used to represent unending amounts. Either plus or minus depending on the situation. If y= [+|-]x then x is either positive or negative depending on the situation. y= [+|-]x y equals either +x or -x depending on the scenario.

List of all math symbols and meaning - equality, inequality, parentheses, plus, minus, times, division, power, square root, percent, per mille,...

The ampersand, or &, is a logogram representing the conjunction 'and'. It originated as a ligature of the letters e and t, from the Latin word 'et', meaning 'and'. In mathematics, it is sometimes used to denote the logical conjunction, or "and" operation. The ampersand, or &, is a logogram representing the conjunction 'and'.

2019年9月7日 · 符号函数（一般用sign (x)表示）是很有用的一类函数，符号函数 能够把函数的符号析离出来 。 在数学和计算机运算中，其功能是取某个数的符号（正或负）：当x>0，sign (x)=1;当x=0，sign (x)=0;当x<0， sign (x)=-1；在通信中，sign (t)表示这样一种信号：当t≥0，sign (t)=1; 即从t=0时刻..._sign函数.

The € (euro sign) symbol is used to represent the euro, which is the official currency of the Eurozone in the European Union. Typically, the symbol is used in an expression like this:

Copy and paste Check Mark Symbol ( , , ∨, √, and more). Check mark symbols can be used to show that something is valid, good, or done.

Sign of Symbolic Expression. Find the sign of this expression assuming that the value x is negative:

The at sign, @, is an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £2 per widget = £14), [1] now seen more widely in email addresses and social media platform handles. It is normally read aloud as "at" and is also commonly called the at symbol, commercial at, or address sign. Most languages have their own name ...

The pound sign (£) is the symbol for the pound unit of sterling – the currency of the United Kingdom and its associated Crown Dependencies and British Overseas Territories and previously of Great Britain and of the Kingdom of England. The same symbol is used for other currencies called pound, such as the Egyptian and Syrian pounds.