Examples with solutions for Power of a Quotient Rule for Exponents: Applying the formula

Exercise #1

2423= \frac{2^4}{2^3}=

Video Solution

Step-by-Step Solution

Let's keep in mind that the numerator and denominator of the fraction have terms with the same base, therefore we use the property of powers to divide between terms with the same base:

bmbn=bmn \frac{b^m}{b^n}=b^{m-n} We apply it in the problem:

2423=243=21 \frac{2^4}{2^3}=2^{4-3}=2^1 Remember that any number raised to the 1st power is equal to the number itself, meaning that:

b1=b b^1=b Therefore, in the problem we obtain:

21=2 2^1=2 Therefore, the correct answer is option a.

Answer

2 2

Exercise #2

9993= \frac{9^9}{9^3}=

Video Solution

Step-by-Step Solution

Note that in the fraction and its denominator, there are terms with the same base, so we will use the law of exponents for division between terms with the same base:

bmbn=bmn \frac{b^m}{b^n}=b^{m-n} Let's apply it to the problem:

9993=993=96 \frac{9^9}{9^3}=9^{9-3}=9^6 Therefore, the correct answer is b.

Answer

96 9^6

Exercise #3

8132= \frac{81}{3^2}=

Video Solution

Step-by-Step Solution

First, we recognize that 81 is a power of the number 3, which means that:

34=81 3^4=81 We replace in the problem:

8132=3432 \frac{81}{3^2}=\frac{3^4}{3^2} Keep in mind that the numerator and denominator of the fraction have terms with the same base, therefore we use the property of powers to divide between terms with the same base:

bmbn=bmn \frac{b^m}{b^n}=b^{m-n} We apply it in the problem:

3432=342=32 \frac{3^4}{3^2}=3^{4-2}=3^2 Therefore, the correct answer is option b.

Answer

32 3^2

Exercise #4

Simplify the following:

a5a3= \frac{a^5}{a^3}=

Video Solution

Step-by-Step Solution

Since a division operation between two terms with identical bases is required, we will use the power property to divide between terms with identical bases:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n} Note that using this property is only possible when the division is carried out between terms with identical bases.

We return to the problem and apply the mentioned power property:

a5a3=a53=a2 \frac{a^5}{a^3}=a^{5-3}=a^2 Therefore, the correct answer is option A.

Answer

a2 a^2

Exercise #5

Simplify the following:


a7a3= \frac{a^7}{a^3}=

Video Solution

Step-by-Step Solution

Sincw a division operation between two terms with identical bases is required, we will use the power property to divide between terms with identical bases:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n} Note that using this property is only possible when the division is performed between terms with identical bases.

We return to the problem and apply the power property:

a7a3=a73=a4 \frac{a^7}{a^3}=a^{7-3}=a^4 Therefore, the correct answer is option C.

Answer

a4 a^4

Exercise #6

Simplify the following:


a3a1= \frac{a^3}{a^1}=

Video Solution

Step-by-Step Solution

Since a division operation between two terms with identical bases is required, we will use the power property to divide between terms with identical bases:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n} Note that using this property is only possible when the division is performed between terms with identical bases.

We return to the problem and apply the power property:

a3a1=a31=a2 \frac{a^3}{a^1}=a^{3-1}=a^2 Therefore, the correct answer is option A.

Answer

a2 a^2

Exercise #7

Simplify the following expression:

a9ax \frac{a^9}{a^x}

Video Solution

Step-by-Step Solution

In the question there is a fraction that has terms with identical bases in its numerator and denominator. Therefore, so we can use the distributive property of division to solve the exercise:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n}

We apply the previously distributive property to the problem:

a9ax=a9x \frac{a^9}{a^x}=a^{9-x}

Therefore, the correct answer is (c).

Answer

a9x a^{9-x}

Exercise #8

Simplify the following:

a4a6= \frac{a^4}{a^{-6}}=

Video Solution

Step-by-Step Solution

Since a division operation between two terms with identical bases is required, we will use the power property to divide terms with identical bases:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n} cmcn=cmn \frac{c^m}{c^n}=c^{m-n} Note that using this property is only possible when the division is performed between terms with identical bases.

We return to the problem and apply the power property:

a4a6=a4(6)=a4+6=a10 \frac{a^4}{a^{-6}}=a^{4-(-6)}=a^{4+6}=a^{10} Therefore, the correct answer is option C.

Answer

a10 a^{10}

Exercise #9

Solve the following exercise

a7ya5x \frac{a^{7y}}{a^{5x}}

Video Solution

Step-by-Step Solution

Let's consider that in the given problem there is a fraction in both the numerator and denominator with terms of identical bases. Hence we use the property of division between terms of identical bases in order to solve the exercise:

cmcn=cmn \frac{c^m}{c^n}=c^{m-n} We apply the previously mentioned property to the problem:

a7ya5x=a7y5x \frac{a^{7y}}{a^{5x}}=a^{7y-5x} Therefore, the correct answer is option A.

Answer

a7y5x a^{7y-5x}

Exercise #10

1X7X6= \frac{1}{\frac{X^7}{X^6}}=

Video Solution

Step-by-Step Solution

First, we will focus on the exercise with a fraction in the denominator. We will solve it using the formula:

anam=anm \frac{a^n}{a^m}= a^{n-m}

x7x6=x76=x1 \frac{x^7}{x^6}=x^{7-6}=x^1

Therefore, we get:

1x \frac{1}{x}

We know that a product raised to the 0 is equal to 1 and therefore:

x0x1=x(01)=x1 \frac{x^0}{x^1}=x^{(0-1)}=x^{-1}

Answer

X1 X^{-1}

Exercise #11

Choose the expression that is equal to the following:

a5:a4 a^5:a^4

Video Solution

Answer

a a

Exercise #12

Insert the corresponding expression:

1411145= \frac{14^{11}}{14^5}=

Video Solution

Answer

146 14^6

Exercise #13

Insert the corresponding expression:

111001170= \frac{11^{100}}{11^{70}}=

Video Solution

Answer

1130 11^{30}

Exercise #14

Insert the corresponding expression:

127126= \frac{12^7}{12^6}=

Video Solution

Answer

121 12^1

Exercise #15

Insert the corresponding expression:

1012105= \frac{10^{12}}{10^5}=

Video Solution

Answer

107 10^7

Exercise #16

Insert the corresponding expression:

6863= \frac{6^8}{6^3}=

Video Solution

Answer

65 6^5

Exercise #17

Insert the corresponding expression:

(4×8×9)2x1= \left(4\times8\times9\right)^{2x-1}=

Video Solution

Answer

(4×8×9)2x4×8×9 \frac{\left(4\times8\times9\right)^{2x}}{4\times8\times9}

Exercise #18

Insert the corresponding expression:

(2×4×5)a(2×4×5)y= \frac{\left(2\times4\times5\right)^a}{\left(2\times4\times5\right)^y}=

Video Solution

Answer

(2×4×5)ay \left(2\times4\times5\right)^{a-y}