Find expert advice and community support for all your questions on IDNLearn.com. Get timely and accurate answers to your questions from our dedicated community of experts who are here to help you.

Expand: [tex]\log _a\left(\frac{x^2 y^3}{2^4}\right)[/tex]

A. [tex]2 \log _a x+3 \log _a y-4 \log _a z[/tex]

B. [tex]2 \log _a x-3 \log _a y+4 \log _a z[/tex]

C. [tex]\log _a x^2+\log _a y^3-4 \log _a z[/tex]


Sagot :

To expand the expression [tex]\(\log_a\left(\frac{x^2 y^3}{2^4}\right)\)[/tex] using logarithm properties, we can follow these steps:

1. Use the Property of Logarithms for Division:
We know that the logarithm of a quotient is the difference of the logarithms: [tex]\(\log_a\left(\frac{M}{N}\right) = \log_a M - \log_a N\)[/tex].

Applying this property:
[tex]\[ \log_a\left(\frac{x^2 y^3}{2^4}\right) = \log_a(x^2 y^3) - \log_a(2^4) \][/tex]

2. Use the Property of Logarithms for Multiplication:
The logarithm of a product is the sum of the logarithms: [tex]\(\log_a(M \cdot N) = \log_a M + \log_a N\)[/tex].

Applying this property:
[tex]\[ \log_a(x^2 y^3) = \log_a x^2 + \log_a y^3 \][/tex]

Thus:
[tex]\[ \log_a\left(\frac{x^2 y^3}{2^4}\right) = \log_a x^2 + \log_a y^3 - \log_a 2^4 \][/tex]

3. Use the Property of Logarithms for Powers:
The logarithm of a power is the exponent times the logarithm of the base: [tex]\(\log_a(M^k) = k \cdot \log_a M\)[/tex].

Applying this property:
[tex]\[ \log_a x^2 = 2 \log_a x \][/tex]
[tex]\[ \log_a y^3 = 3 \log_a y \][/tex]
[tex]\[ \log_a 2^4 = 4 \log_a 2 \][/tex]

Therefore:
[tex]\[ \log_a\left(\frac{x^2 y^3}{2^4}\right) = 2 \log_a x + 3 \log_a y - 4 \log_a 2 \][/tex]

Hence, the expanded form of the logarithmic expression is:

[tex]\[ 2 \log_a x + 3 \log_a y - 4 \log_a 2 \][/tex]

Looking at the provided options:
- [tex]\(2 \log_a x + 3 \log_a y - 4 \log_a z\)[/tex]
- [tex]\(2 \log_a x - 3 \log_a y + 4 \log_a z\)[/tex]
- [tex]\(\log_a x^2 + \log_a y^3 - 4 \log_a z\)[/tex]

None of these exactly match [tex]\(2 \log_a x + 3 \log_a y - 4 \log_a 2\)[/tex], but the process should be understood step by step as illustrated above.