You can rewrite it as: (using the law of dividing exponents)
9^(2-7) = 9^(-5) = 1/(9^5)
The fourth one
Answer:
1/ 9^5
Explanation:
When dividing exponents with the same base, subtract the exponents
9^2 / 9^7
9 ^ (2-7)
9^ -5
We know that a^ -b = 1/ a^b
5.6m questions
7.3m answers