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# 8 3 zero & negative - day 2

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### 8 3 zero & negative - day 2

1. 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. 2. P. 504 – Key Concepts
3. 3. 2 3 22x y 5 5x
4. 4. 3 4 55x y 6 xy 2  3 3 2x 10 x y
5. 5. 3 2 027 x yz 5 14 3 xy z
6. 6. 0 2( 4  9  3)
7. 7. Continue P. 506 28-45• Copy the problem, then simplify. There can be NO NEGATIVE EXPONENTS in your final answer.