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(of a real number)

When a real number a is raised to the index p to give ap, the result is a power of a. The same index notation is used in other contexts, for example to give a power Ap of a square matrix (see power (of a matrix) or a power gp of an element g in a multiplicative group. When ap is formed, p is sometimes called the power, but it is more correctly called the index to which a is raised.

Subjects: Mathematics.

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