Video info
 Topic: Power
 Title: power
 Post date: 8/2/2012
 Posted by: xa0s
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 Total Ratings: 0 ratings

Description: A number placed in a superscript position to the right of another number or variable to indicate repeated multiplication: a2 indicates a x a, a3 indicates a x a x a, etc. Sometimes ‘power’ is used instead of exponent; more strictly, power is the result of the multiplication  for instance, 4 is the second power of 2 (i.e. 22). If the exponent is negative then the expression is the reciprocal of the number with a positive value of the exponent: for example, xn = 1/xn. Any number with an exponent of zero is equal to 1 (x0 = 1). Certain laws of exponents (laws of indices) apply: multiplication: anam = an+m; division: an/am = anm; raising to a power: (an)m = anm. Fractional exponents are defined byam/n = n√(am). This sign video was contributed by users of the ASLSTEM Forum: http://aslstem.cs.washington.edu/