Math Problem Statement

Expand the logarithm fully using the properties of logs. Express the final answer in terms of log, xlogx, log, ylogy, and log, zlogz. log, start fraction, x, divided by, cube root of, z, to the power 5 , end cube root, y, squared, end fraction log 3

z 5

​ y 2

x ​

Solution

To expand the given logarithmic expression:

log(xz5y23)\log \left( \frac{x}{\sqrt[3]{z^5 y^2}} \right)

we will use the properties of logarithms, such as:

  1. The quotient rule: log(ab)=log(a)log(b)\log \left( \frac{a}{b} \right) = \log(a) - \log(b)
  2. The product rule: log(ab)=log(a)+log(b)\log(a \cdot b) = \log(a) + \log(b)
  3. The power rule: log(ab)=blog(a)\log(a^b) = b \log(a)
  4. The root rule: log(an)=1nlog(a)\log \left( \sqrt[n]{a} \right) = \frac{1}{n} \log(a)

Step-by-step expansion:

  1. Apply the quotient rule:

[ \log \left( \frac{x}{\sqrt[3]{z^5 y^2}} \right) = \log(x) - \log \left( \sqrt[3]{z^5 y^2} \right) ]

  1. Simplify the second term using the root rule:

log(z5y23)=13log(z5y2)\log \left( \sqrt[3]{z^5 y^2} \right) = \frac{1}{3} \log \left( z^5 y^2 \right)

  1. Apply the product rule to the logarithm of the product inside:

log(z5y2)=log(z5)+log(y2)\log \left( z^5 y^2 \right) = \log(z^5) + \log(y^2)

  1. Apply the power rule to both terms inside the logarithms:

log(z5)=5log(z),log(y2)=2log(y)\log(z^5) = 5 \log(z), \quad \log(y^2) = 2 \log(y)

Thus, we have:

log(xz5y23)=log(x)13(5log(z)+2log(y))\log \left( \frac{x}{\sqrt[3]{z^5 y^2}} \right) = \log(x) - \frac{1}{3} \left( 5 \log(z) + 2 \log(y) \right)

  1. Distribute the 13\frac{1}{3}:

=log(x)53log(z)23log(y)= \log(x) - \frac{5}{3} \log(z) - \frac{2}{3} \log(y)

Final expanded form:

log(x)53log(z)23log(y)\log(x) - \frac{5}{3} \log(z) - \frac{2}{3} \log(y)

This is the fully expanded form of the logarithmic expression.


Would you like more details or have any questions about the steps? Here are some related questions you might find interesting:

  1. How do logarithmic identities apply to solving equations?
  2. Can the power rule be used with other types of roots, like square roots or fourth roots?
  3. How does the change of base formula help when calculating logarithms?
  4. What are some common mistakes when expanding logarithmic expressions?
  5. How would you simplify a logarithmic expression involving multiple bases?

Tip: Always break down complex expressions step by step using the basic logarithmic rules. This makes the process clearer and more manageable!

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Math Problem Analysis

Mathematical Concepts

Logarithms
Logarithmic Expansion
Properties of Logarithms

Formulas

Logarithmic quotient rule: log(a/b) = log(a) - log(b)
Logarithmic product rule: log(a * b) = log(a) + log(b)
Logarithmic power rule: log(a^b) = b * log(a)
Logarithmic root rule: log(√[n](a)) = (1/n) * log(a)

Theorems

Properties of logarithms
Power rule
Quotient rule
Product rule

Suitable Grade Level

Grades 9-12