The radical symbol √ (with a line over what you're taking a root of) denotes root.
The symbol without any other numbers, means square root, while with a number like 3√ means take cube root, 4√ fourth root, etc.
If you want to type this symbol in Windows, hold down the
You can also denote roots by fractional exponents: 1/2 power is the square root,
1/3 power is the cube root, etc and this works if you have an xy (exponentiation)
key on your calculator and want to compute roots.
The symbol used to make a root is √
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Any symbol can be used to denote a set of integers. The set of all integers is denoted by Z, and the set of natural numbers by N.
It is the RADICAL SIGN , its definition is - the symbol used to indicate a nonnegitive square root.
The square root symbol (√) was first used in 1525, by Christoph Rudolff, and is called a radical.
The radical symbol ( √ ) followed by a line above what's in the radical, designates positive square root.
It is imaginary; we denote sqrt of -1 = i square root (-4) = ± 2i