Question

define:-. exponent and power

Answer 1

No. of time a number is multipled is called power or exponent.

a^2

Here a is base and 2 is power or exponent.
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Answer 2

In general, for any rational number a and a positive integer n , we define
a^n = a*a*a*........*a (n times)
a^n is called the n^th power of a and is also read as a raised to the power n.
the rational number a is called the base and n is called the exponent or power or index.