In mathematics, that which is represented by an exponent
or index, denoted by a superior numeral. A number or symbol raised to
the power of 2 – that is, multiplied by itself – is said to be squared
(for example, 32, x2), and when raised to the power of 3, it is said to be cubed (for example, 23, y3). Any number to the power zero always equals 1.
Powers can be negative. Negative powers produce fractions, with the numerator as one, as a number is divided by itself, rather than being multiplied by itself, so for example 2-1 = 1/2 and 3-3 = 1/27.
Powers can be negative. Negative powers produce fractions, with the numerator as one, as a number is divided by itself, rather than being multiplied by itself, so for example 2-1 = 1/2 and 3-3 = 1/27.
© RM 2012. Helicon Publishing is division of RM.
Fuente: http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0002499.html
Fuente: http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0002499.html
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