Powers of a Fraction - Examples, Exercises and Solutions

Let's determine the corresponding expression for $\left(\frac{2}{3}\right)^a$:

We apply the property of exponentiation for fractions, which states:
$\left(\frac{x}{y}\right)^n = \frac{x^n}{y^n}$.

Substituting $x = 2$, $y = 3$, and $n = a$, we have:

$\left(\frac{2}{3}\right)^a = \frac{2^a}{3^a}$.

Therefore, the correct expression is $\frac{2^a}{3^a}$.

Assessing the possible choices:

• Choice 1: $\frac{2}{3^a}$ - This is incorrect as it does not raise the numerator to $a$.
• Choice 2: $\frac{2a}{3a}$ - This is incorrect as it misuses the exponent rule.
• Choice 3: $\frac{2^a}{3^a}$ - This is correct, as it follows the exponentiation property.
• Choice 4: $\frac{2^a}{3}$ - This is incorrect as it does not raise the denominator to $a$.

Thus, the correct choice is Choice 3: $\frac{2^a}{3^a}$.

To solve the expression $\left(\frac{10}{13}\right)^{-4}$, we start by applying the rule for dividing exponents is:

$\frac{10^{-4}}{13^{-4}}$, which maintains the negative exponent but as separate components of fraction resulting in the same value.

Consequently, the expression $\left(\frac{10}{13}\right)^{-4}$ equates to $\frac{10^{-4}}{13^{-4}}$.

By comparing this with the presented choices, we identify that option (2):

$\frac{10^{-4}}{13^{-4}}$

matches correctly with our conversion of the original expression.

Therefore, the correct expression is $\frac{10^{-4}}{13^{-4}}$.

To solve this problem, we'll follow these steps:

• Step 1: Identify the given expression $\left(\frac{13}{19}\right)^7$.
• Step 2: Apply the exponent rule for fractions: $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$.
• Step 3: Perform the calculation by raising both the numerator and the denominator to the power of 7.

Now, let's work through each step:
Step 1: The expression provided is $\left(\frac{13}{19}\right)^7$, which is a fraction raised to an exponent.
Step 2: Using the exponentiation rule for fractions: $\left(\frac{a}{b}\right)^n$ is equivalent to $\frac{a^n}{b^n}$.
Step 3: Applying this rule, we express $\left(\frac{13}{19}\right)^7$ as $\frac{13^7}{19^7}$.

Therefore, the solution to the problem is $\frac{13^7}{19^7}$, which corresponds to choice 1.

To solve this problem, we will apply the rules of exponents:

• Step 1: Identify the Given Expression
• Step 2: Apply the Exponent Rule

Now, let's work through these steps:

Step 1: We are given the expression $\left(\frac{3}{4}\right)^x$.

Step 2: According to the rule of exponents, when a fraction is raised to a power, this is equivalent to raising both the numerator and the denominator to that power. Therefore, we have:

$\left(\frac{3}{4}\right)^x = \frac{3^x}{4^x}$

Therefore, the expression $\left(\frac{3}{4}\right)^x$ is equivalent to $\frac{3^x}{4^x}$.

Thus, the correct answer is option 1, which is $\frac{3^x}{4^x}$.

The solution to the problem is $\frac{3^x}{4^x}$.

We need to use the properties of exponents to rewrite the expression $\left(\frac{5}{6}\right)^{10}$.

According to the rule of powers for fractions, when a fraction is raised to a power, both the numerator and the denominator must be raised to that power:

• $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$

Therefore, applying this rule to our expression:

$\left(\frac{5}{6}\right)^{10} = \frac{5^{10}}{6^{10}}$

Thus, we have correctly rewritten the given expression using exponent rules.

The corresponding expression for $\left(\frac{5}{6}\right)^{10}$ is $\frac{5^{10}}{6^{10}}$.

To solve this problem, we will rewrite the expression $\left(\frac{6}{x}\right)^3$ using the power of a fraction rule. The steps are as follows:

• Identify the fraction's numerator $6$ and denominator $x$.

• According to the power of a fraction rule, apply the power 3 to both the numerator and the denominator:

• $\left(\frac{6}{x}\right)^3 = \frac{6^3}{x^3}$.

Therefore, the expression is correctly written as $\frac{6^3}{x^3}$.

Comparing with the provided answer choices, the correct choice is choice $2$:

$\frac{6^3}{x^3}$

To solve this problem, we will use the exponent rule for fractions, which states that $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$.

• Step 1: Recognize that the given expression is $\left(\frac{9}{20}\right)^6$. This means we have a fraction base with an exponent 6.
• Step 2: Apply the exponent rule: $\left(\frac{9}{20}\right)^6 = \frac{9^6}{20^6}$.
• Step 3: Compare this with the given multiple choices to select the correct one.

Upon comparing, we see that the correct choice from the given options is $\frac{9^6}{20^6}$, which matches the expression derived using the exponent rule.

Therefore, the solution to the problem is $\frac{9^6}{20^6}$.

We need to rewrite the expression $\left(\frac{a}{3}\right)^2$ using the rule of exponents for fractions. This rule states that if you have a fraction $\left(\frac{m}{n}\right)$ and you raise it to a power $k$, it is equivalent to raising both the numerator and the denominator to the power $k$. Therefore, we have:

$\left(\frac{a}{3}\right)^2 = \frac{a^2}{3^2}$

Here, $a^2$ is the numerator and $3^2$ is the denominator. The expression simplifies to:

$\frac{a^2}{9}$

Based on the provided choices, the correct answer is:

Choice 1: $\frac{a^2}{3^2}$

Therefore, the solution to the given problem is $\frac{a^2}{3^2}$.

The problem asks us to express $\left(\frac{a}{b}\right)^9$ using exponent rules. We will use the rule for the power of a fraction, which states:

$\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$

Applying this rule, we get:

$\left(\frac{a}{b}\right)^9 = \frac{a^9}{b^9}$

This method ensures that the exponent $9$ is applied to both the numerator and the denominator of the fraction.

Therefore, the solution to the problem is $\frac{a^9}{b^9}$.

To solve this problem, we'll apply the exponent rule for fractions:

• Step 1: Identify the fraction $\frac{b}{5}$ and the power $4$.
• Step 2: Apply the exponent to both the numerator and the denominator, as per the formula.
• Step 3: Use the rule $\left(\frac{b}{5}\right)^4 = \frac{b^4}{5^4}$.

Now, let's work through the application:
Step 1: We have the base fraction $\frac{b}{5}$ and exponent $4$.
Step 2: According to the exponent rule, $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$, apply the exponent $4$ to both $b$ and $5$.
Step 3: This results in the expression $\frac{b^4}{5^4}$.

Therefore, the expression $\left(\frac{b}{5}\right)^4$ simplifies to $\frac{b^4}{5^4}$.

To solve this problem, we will apply the power of a fraction rule:

Step 1: Recognize that we are asked to simplify $\left(\frac{x}{y}\right)^8$.

Step 2: Apply the power of a fraction rule, which states:

• $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$

Step 3: Use this formula to obtain:

$\left(\frac{x}{y}\right)^8 = \frac{x^8}{y^8}$

Therefore, the simplified expression of $\left(\frac{x}{y}\right)^8$ is $\frac{x^8}{y^8}$.

The correct choice from the given options is:

$\frac{x^8}{y^8}$

The fraction $\frac{10}{13}$ raised to the power of 8 can be expressed by applying the power to both the numerator and the denominator based on the rule for powers of a fraction:

$\left(\frac{10}{13}\right)^8 = \frac{10^8}{13^8}$

To solve for the given expression, we use the formula $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$. This means that the fraction power rule allows us to take each component of the fraction and raise it to the required power:

• Step 1: Apply the power of 8 to the numerator: $10^8$.
• Step 2: Apply the power of 8 to the denominator: $13^8$.
• Step 3: Combine both into a single fraction: $\frac{10^8}{13^8}$.

Thus, the expression $\left(\frac{10}{13}\right)^8$ simplifies to $\frac{10^8}{13^8}$.

Therefore, the correct answer from the choices provided is $\frac{10^8}{13^8}$, corresponding to choice 3.

To solve this problem, we need to simplify the expression $\left(\frac{1}{5}\right)^3$ using the exponent rules for fractions:

• Step 1: Identify the base and the exponent. Here, the base is $\frac{1}{5}$ and the exponent is $3$.
• Step 2: Apply the rule for raising a fraction to a power. The rule states that $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$.
• Step 3: Apply the exponent to both the numerator and the denominator:

Thus, $\left(\frac{1}{5}\right)^3 = \frac{1^3}{5^3}$.

Therefore, the simplified expression is $\frac{1^3}{5^3}$, which corresponds to choice 1 in the provided options.

To solve this problem, we'll follow these steps:

• Identify the given expression which is $\left(\frac{20}{21}\right)^4$.

• Apply the exponentiation rule for fractions: $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$.

• Calculate $20^4$ and $21^4$ and place them as the numerator and denominator, respectively.

Now, let's work through each step:
Step 1: We begin with the expression $\left(\frac{20}{21}\right)^4$.
Step 2: Using the power of a fraction rule, we have $\left(\frac{20}{21}\right)^4 = \frac{20^4}{21^4}$.

Therefore, the corresponding simplified expression is $\frac{20^4}{21^4}$.

To solve this problem, we will apply the exponent rule for fractions:

• Step 1: We are given the expression $\left(\frac{2}{3}\right)^2$.
• Step 2: Apply the fraction exponent rule: $\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}$.

Applying this rule to our expression:

$\left(\frac{2}{3}\right)^2 = \frac{2^2}{3^2}$.

Calculating further would give:

$\frac{2^2}{3^2} = \frac{4}{9}$.

However, the question asks to only match the expression, which is $\frac{2^2}{3^2}$.

The correct choice from the given options is $\frac{2^2}{3^2}$.

This matches Choice 3 in the provided multiple choices.