6 Powers and surds on your calculator
Inputting fractional and negative powers
In Activity 4 you saw how to use the 
key to input powers on the calculator. The key can be used with other functions, such as the fraction template 
, to calculate fractional and negative powers.
Activity 14 Calculating more powers
Calculate each of the following using your calculator, giving your answer correct to 3 significant figures.
Answer
(to 3 significant figures) using the key sequence 
.
(to 3 significant figures) using the key sequence 
.
(to 3 significant figures) using the key sequence 
.