1. Exponent Rules
• Let ‘a ’ be a nonzero number and let ‘n’ be a
positive integer,
A nonzero number to the zero power is 1:
a0 = 1 (a = 0)
20 = 1 (-2)0 = 1
a-n is the reciprocal of an: therefore
a-n = 1 / an , (a = 0 ) so 2-3 = 1/ 23
an = 1/a-n 23 = 1/ 2-3

2. P. 504 – Key Concepts

3. 2 3 2
2x y
5
5x

4. 3 4 5
5x y 6 xy
2
 3 3
2x 10 x y

5. 3 2 0
27 x yz
5 14
3 xy z

6. 0 2
( 4  9  3)

7. Continue P. 506 28-45
• Copy the problem, then simplify. There
can be NO NEGATIVE EXPONENTS in
your final answer.