91Ó°ÊÓ

${\text{a}}^{\text{x}}→$a is the base and x is exponent.

The power is the result of repeated multiplication of the same factor.

The expressionsa^xthis means that a has been used as a factor x times

Example: Find the base and the exponent of 2⁷ and evaluate the value.

Rule: ${\text{a}}^{\text{x}}→$a is called base and x is exponent.

a = 2 and x = 7

Base = 2 and exponent = 7

Evaluate: $2^7=2 · 2 · 2  · 2 · 2 · 2 · 2 =128$

Evaluate the expression ${(0.3)}^3$

According to the exponent rule:

${\text{a}}^{\text{x}}→$a is called base and x is power.

a = 0.3 and x = 3

In repeated multiplication:${(0.3)}^3  =  0.3  ·  0.3  ·  0.3$

Evaluate the expression ${(0.3)}^3  =  0.3  ·  0.3  ·  0.3  =  0.027$

The value of ${(0.3)}^3$after evaluating the power is 0.027.