4. n th Roots n th Roots An n th root of number a is a number whose n th power is a . a number whose n th power is a If the index n is even, then the radicand a must be nonnegative. is not a real number

5. Square Root of x 2 Page 393

6. Radicals

7. Rational Exponents

8. Exponent 1/ n When n Is Even

9. When n Is Even

10. Exponent 1/ n When n Is Odd

11. Exponent 1/ n When n Is Odd

12. n th Root of Zero

13. Rational Exponents

14. Evaluating in Either Order

15. Negative Rational Exponents

16. Evaluating a - m/n

17. Rules for Rational Exponents 7-6

18. Simplifying

19. Simplifying

20. Simplifying

21. Multiplying Radicals – Different Indices

23. Different Indices

24. Different Indices

25. Different Indices

27. Eliminate the Root, Then the Power

28. Negative Exponents

33. Strategy for Solving Equations with Exponents and Radicals