Generally speaking, power is what we usually call many times power. For example, a square is called a quadratic power, a cube is called a cubic power, and the power is an integer, not a fraction or a decimal.

Let a be a certain number, n be a positive integer, and the n power of a is expressed as a? That represents the result of n times multiplication, such as 2? =2×2×2×2= 16。 The definition of power can also be extended to zero power and negative power and so on.

When inputting mathematical formulas on the computer, because it is inconvenient to input the power, the symbol ""is often used to represent the power. For example, the fifth power of 2 is usually expressed as 2 5.

Extended data:

Power comparison method

1, calculation comparison method

First, calculate the power, and then compare it according to the size of the results.

2. Basic comparison method

In the case of the same exponent, the size of two powers can be determined by comparing the size of the base.

3. Exponential comparison method

In the case of the same cardinality, we can determine the size of two powers by comparing the sizes of exponents.

4. Difference comparison method

Subtract the two powers, and determine the size of the two powers according to the comparison between the difference and 0.