指数

Exponentiation [,ekspənenʃɪ'eɪʃ(ə)n]

• Exponentiation is a mathematical operation, written as bn, involving two numbers, the base b and the exponent (or power) n.

• 2次方为squared，3次方为cubed或to the third，往后依次为to the fourth, to the fifth, … 举例如下：

  • three squared

  • 4 raised to the fifth power

  • 4 raised to the power of 5

  • the fifth power of 4

  • 4 to the fifth

  • 4 to the 5

• 值得注意的是，如果是负次方，则需要在序数前加minus。