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Simplify each of the following and express the final results using positive exponents only. $$\left(2 x^{\frac{1}{3}}\right)\left(3 x^{\frac{1}{2}}\right)=6 x^{\frac{3}{5}}$$ $$\left(7 n^{-\frac{1}{3}}\right)\left(8 n^{\frac{3}{6}}\right)$$

Short Answer

Expert verified
The simplified expression is \(56n^{\frac{1}{6}}\).

Step by step solution

01

Identify and Simplify the Coefficients

In the expression \((7 n^{-\frac{1}{3}})(8 n^{\frac{3}{6}})\), separate the coefficients and the bases. Multiply the coefficients: \(7 \times 8 = 56\). The expression becomes \(56 \cdot (n^{-\frac{1}{3}} \cdot n^{\frac{3}{6}})\).
02

Simplify the Exponents

Combine the exponents by adding them, according to the property of exponents: \(a^m \times a^n = a^{m+n}\). The expression has \(n^{-\frac{1}{3}}\) and \(n^{\frac{3}{6}}\). Simplify the exponent \(\frac{3}{6}\) to \(\frac{1}{2}\). Therefore, the exponents combine as: \(-\frac{1}{3} + \frac{1}{2}\).
03

Find a Common Denominator and Add Exponents

Convert the fractions \(-\frac{1}{3}\) and \(\frac{1}{2}\) to have a common denominator of 6: \(-\frac{1}{3} = -\frac{2}{6}\) and \(\frac{1}{2} = \frac{3}{6}\). Add the exponents: \(-\frac{2}{6} + \frac{3}{6} = \frac{1}{6}\).
04

Write the Simplified Expression

Combine the simplified coefficient and the exponent result. The expression becomes \(56n^{\frac{1}{6}}\). Since the exponent \(\frac{1}{6}\) is positive, write the final answer as \(56n^{\frac{1}{6}}\) with no changes needed to the exponent.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Exponent Rules
When dealing with exponents, there are a few handy rules to keep in mind. These make simplifying expressions much easier. One important rule is the product of powers rule. It states that when you multiply two expressions with the same base, you can add their exponents.
This rule is expressed as: \(a^m \times a^n = a^{m+n}\).
  • For example, \(x^2 \times x^3 = x^{2 + 3} = x^5\).
  • This means, as long as the bases match, you keep the base and simply add the exponents.
Another important rule is the power of a power rule. This applies when an exponent is raised to another exponent. In such a case, you multiply the exponents: \((a^m)^n = a^{m \times n}\). Mastery of these rules can help tackle complex expressions more effectively.
Focusing on knowing and applying exponent rules accurately will significantly simplify your algebraic work.
Negative Exponents
Negative exponents can be confusing initially but are straightforward once understood. Essentially, a negative exponent indicates that the base should be on the opposite side of a fraction's line.
For example, \(a^{-m}\) translates to \(\frac{1}{a^m}\). This means that the negative signs in exponents represent an inverse of the base:
  • \(x^{-1} = \frac{1}{x}\)
  • \(x^{-2} = \frac{1}{x^2}\)
Applying this concept to simplify expressions, let's say you have \(7n^{-1/3}\). To express it with a positive exponent, transform it into \(\frac{7}{n^{1/3}}\).
Hence, knowing how to deal with negative exponents transforms seemingly complex expressions into simpler, easily manageable fractions.
Fractional Exponents
Fractional exponents are another essential aspect of simplifying expressions. These are also known as rational exponents, representing roots of the base. For instance, \(a^{1/n}\) translates to the \(n\)th root of \(a\), i.e., \(\sqrt[n]{a}\).
  • For example, \(a^{1/2} = \sqrt{a}\), and \(a^{1/3} = \sqrt[3]{a}\).
  • The numerator indicates the power the base is raised to, while the denominator signifies the type of root.
In cases where the fractional exponent is not just \(1/n\), such as \(a^{m/n}\), it equates to the \(n\)th root of \(a\) raised to the power of \(m\). That is, \(a^{m/n} = \sqrt[n]{a^m}\).
These fractional exponents simplify the way we handle roots and powers simultaneously, making algebra easier and more flexible to work through."}]} 乇爻賲 丕賱亘賷丕賳賷 賱賱爻胤丨 丕賱賲丕卅賱 賮賯丕讗诇賮賮 讴賴賴喔`阜喔壻囒 丕賱兀爻鬲丕匕 毓賱卮鬲噩賴蹖夭亘夭丕 乇賮賳issimo乇賮鬲禺 卮鬲讴賴 賱賱賲丕賳乇賮賳ployit谩vel胁芯泄銈炽儫銉冦儓銈偓 賳蹖 毓賴Tadosiseerde 讴乇丿賵丕############################################################enny3<|vq_162|>{

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