Question

Divide and write your answer without negative exponents. $$\frac{10^{6}}{10^{2}}$$

Short answer

\(10^{4}\)

Step-by-step solution

Apply the Quotient of Powers Rule

The Quotient of Powers Rule states that when you divide two powers with the same base, you subtract the exponents. Here the base is 10 and we have exponents 6 and 2. So you subtract the exponent of the denominator from the exponent of the numerator: \(10^{6-2}\).

Subtract the Exponents

Subtract the exponents: 6 - 2 = 4.

Write the Simplified Result

After subtracting the exponents, you are left with \(10^{4}\), which is the simplified form without negative exponents.

Key concepts

Negative Exponents

Understanding negative exponents is crucial when dealing with the division of powers, as they often represent the reciprocal of a base raised to a positive exponent. For instance, if we have an expression like \(10^{-3}\), we can interpret it as \(\frac{1}{10^3}\), or 1 divided by 10 cubed. This conversion from a negative exponent to its positive counterpart is essential in simplifying expressions to a form without negative exponents.

To make this very clear, let's consider another example: \(5^{-2}\). According to the rule for negative exponents, this is equivalent to \(\frac{1}{5^2}\), which simplifies further to \(\frac{1}{25}\). This understanding allows students to simplify expressions by eliminating negative exponents and writing the final answer in a more conventional form.

Exponent Subtraction

The Quotient of Powers Rule is an application of exponent subtraction, which simplifies the process of dividing powers with the same base. The rule is straightforward: when you have an expression like \(a^m / a^n\), where \(a\) is the base and \(m\) and \(n\) are exponents, you subtract the exponent of the denominator from that of the numerator to find the simplified form: \(a^{m-n}\).

Let's break this down with an illustrative example: Given \(2^{8} / 2^{3}\), we use exponent subtraction (8 - 3) to find that \(2^{8-3} = 2^{5}\). This rule manages to condense the operation into a single, more manageable expression without the need for long division or complex calculations. It's a handy tool that students can use whenever they encounter quotients of like bases.

Simplifying Exponential Expressions

Simplifying exponential expressions is a fundamental skill in algebra that involves applying rules like the Quotient of Powers Rule and handling negative exponents to write expressions in their simplest form. Simplification can involve several steps, beginning with the use of exponent subtraction, as we would with \(10^{6} / 10^{2}\), which simplifies to \(10^{6-2} = 10^{4}\).

After applying these basic rules, it's essential to ensure that the resulting expression does not contain any negative exponents, as our ultimate goal is to express our answer in a positive and easily interpretable form. Students should also be attentive to the possibility of further simplification by evaluating the powers or combining like terms. Simplifying exponential expressions not only makes mathematical problems more manageable but also helps students to better understand the underlying properties of exponents.