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Bookmark or Share- 1 - WikipediaIn mathematics, 1 is the multiplicative identity, meaning that any number multiplied by 1 equals the same number. 1 is by convention not considered a prime number. In digital technology , 1 represents the "on" state in binary code , the foundation of computing .
- Euler's identity - WikipediaIn mathematics, Euler's identity [note 1] (also known as Euler's equation) is the equality + = where is Euler's number, the base of natural logarithms, is the imaginary unit, which by definition satisfies =, and
- Somebody That I Used to Know - WikipediaDespite an initial lack of airplay on major radio stations, the song reached number 1 in the week ending 15 August, becoming the first single by either artist to do so and their most successful single.
- Imaginary number - WikipediaAn imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i 2 = −1. [ 1 ] [ 2 ] The square of an imaginary number bi is − b 2 . For example, 5 i is an imaginary number, and its square is −25 .
- Imaginary unit - WikipediaThe imaginary unit or unit imaginary number (i) is a mathematical constant that is a solution to the quadratic equation x 2 + 1 = 0. Although there is no real number with this property, i can be used to extend the real numbers to what are called complex numbers , using addition and multiplication .
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