Prerequisites - P.2 - Exponents and Radicals - Exercises - Page 24: 8

Power, index

Look at the definition of the power and index for rational exponents on page 24. The index of a number says how many times the number should be multiplied. Example : In $x^{y}$ the number x should be multiplied y times and hence y is the index of x. Other terms for index are power and exponent.