Power (English spelling) - power

Japanese: べき(冪∥羃) - べき（英語表記）power

The product of multiplying a number, variable, expression, or function several times is called the power or exponent of the original number, variable, expression, or function. x × x , x × x × x , … are expressed as x ² , x ³ , … respectively, and are called x squared, x cubed, …. The number on the right indicates how many times the same thing was multiplied, and is called the power exponent. Note that squaring is also called squaring or square, and cubed is also called cube.
[Exponential Law]
For some numbers, variables, expressions, or functions x and y and some natural numbers m and n , the following holds:

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

一つの数，変数，式，または関数を何回か掛けた積を，もとの数，変数，式，関数のべき，あるいは累乗という。x×x,x×x×x，……を，それぞれx²,x³，……で表し，xの2乗，xの3乗，……という。右肩の数字は，何回同じものを掛けたかを表し，これをべき指数と呼ぶ。なお，2乗のことを自乗，または平方，3乗のことを立方ともいう。
［指数法則］
　数，変数，式，または関数x,yと自然数m,nについて，次が成り立つ。

出典　株式会社平凡社世界大百科事典第２版について　情報

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