Exercise 1 Page 390

The cube root of a number a is another number b if b multiplied by itself three times is a. This means that if b is the cube root of a, then b raised to the third power results in a. Let's see some examples of this. sqrt(a)= b because b^3= a [0.8em] c|c sqrt(- 8)= - 2 & sqrt(27)= 3 because( - 2)^3= - 8 & because 3^3= 27 We will now find the cube root of 1. We need to think of a number that when multiplied by itself three times results in 1. ?^3= 1 Since 1 raised to the third power is 1, the number we are looking for is 1.

(1)(1)(1)

ProdToPowThreeFac

a* a* a=a^3

(1)^3

CalcPow

Calculate power

1

This means that the cube root of 1 is 1. sqrt(1) = 1