Calculate the negative square: that is, the square of the reciprocal of this number (this power is the absolute value of the original number). Let a and b be positive numbers, (-a)-b =1/(-a) B. When the exponent of the power of a is negative, it is called "negative exponential power". The definition of negative exponential power is equal to the reciprocal of the power obtained by changing the sign of the power exponent. For example, the square of -2 is equal to the square of -2 1.

Generally speaking, in mathematics, we write the product of multiplying n identical factors A as n. This operation of multiplying several identical factors is called power, and the result of power is called power. In n, a is called the base and n is called the exponent. N is pronounced "a to the n power" or "a to the n power".

A number can be regarded as the first power of the number itself. For example, 5 is 5 1, and the index 1 is usually omitted. Quadratic is also called square, for example, 5 2 is usually pronounced as "the square of 5"; Cubes are also called cubes. For example, 5 3 can be read as "5 cubes".

Extended data:

First, the definition of power

Power refers to the result of power operation. Nm refers to the result of multiplying m by n, which is called the m power of n, and also called the m power of n, where n is the base and m is the power exponent.

Second, the operation theorem of power

Homobasic power: am× an = am+n; am/an=am-n

Power of product: ambm = (ab) m.

Third, the comparison of negative exponential powers

Compared with the negative exponential power with positive radix, the larger the exponent, the greater the power.

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