Mathematical power is the result of power operation, which refers to the form of multiplying a number by several times. N m means the multiplication of m n, and n is regarded as the result of power, which is read as the m power of n or the m power of n.

When the index is 1, it is usually not written because the calculated value is the same as the base value; When the index is 2, it can be read as "the square of b"; When the index is 3, it can be read as "the cube of B".

Size 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.