Law 2 Division of Exponents


 
 
Concept Explanation
 

Law 2 Division of Exponents

If we have to divide the powers which have the same base then we have to subtract the exponents. i.e.

frac{a^m}{a^n}=a^{m- n}

Example:

1.;;frac{7^9}{7^3}=7^{9-3}=7^6

2.;; frac{8^5}{8^7}=8^{5-7}=8^-^2=frac{1}{8^2}

3. ;; frac{8^5}{2^4}=frac{(2^3)^5}{2^4}=frac{2^1^5}{2^4}=2^{15-4}=2^1^1

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Sample Questions
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Question : 1

Express in power notation:large left ( frac{4^3}{4^2} right )X4^3

Right Option : C
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Question : 2

Using laws of exponents, simplify and write the answer in exponential form:frac{5^{12}}{5^3}

Right Option : A
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Explanation
Question : 3

Express in exponential form :  large left ( frac{8^5}{8^3} right )X8^2

Right Option : C
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Explanation
 
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