Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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What is b?

In this educational setting, we explore an interesting mathematical expression. The equation given in the image is:

\[
\sqrt{4^a} \cdot \sqrt{4^b} = 2^{b}
\]

Explanation: 
- The term \(\sqrt{4^a}\) represents the square root of \(4\) raised to the power of \(a\).
- The term \(\sqrt{4^b}\) represents the square root of \(4\) raised to the power of \(b\).

To further understand, let’s simplify both square root terms:

\[
\sqrt{4^a} = (\sqrt{4})^a = 2^a
\]

\[
\sqrt{4^b} = (\sqrt{4})^b = 2^b
\]

Thus, the equation now becomes:

\[
2^a \cdot 2^b
\]

Using the properties of exponents, we know that:

\[
2^a \cdot 2^b = 2^{a+b}
\]

Therefore, the given equation can be simplified to:

\[
2^{a+b} = 2^b
\]

For the equality to hold true, \(a + b\) must be equal to \(b\). Therefore:

\[
a + b = b
\]

Subtract \(b\) from both sides:

\[
a = 0
\]

This shows that the simplest solution to the equation is when \(a = 0\). This mathematical expression is a good example of exploring the properties of exponents and square roots.
Transcribed Image Text:In this educational setting, we explore an interesting mathematical expression. The equation given in the image is: \[ \sqrt{4^a} \cdot \sqrt{4^b} = 2^{b} \] Explanation: - The term \(\sqrt{4^a}\) represents the square root of \(4\) raised to the power of \(a\). - The term \(\sqrt{4^b}\) represents the square root of \(4\) raised to the power of \(b\). To further understand, let’s simplify both square root terms: \[ \sqrt{4^a} = (\sqrt{4})^a = 2^a \] \[ \sqrt{4^b} = (\sqrt{4})^b = 2^b \] Thus, the equation now becomes: \[ 2^a \cdot 2^b \] Using the properties of exponents, we know that: \[ 2^a \cdot 2^b = 2^{a+b} \] Therefore, the given equation can be simplified to: \[ 2^{a+b} = 2^b \] For the equality to hold true, \(a + b\) must be equal to \(b\). Therefore: \[ a + b = b \] Subtract \(b\) from both sides: \[ a = 0 \] This shows that the simplest solution to the equation is when \(a = 0\). This mathematical expression is a good example of exploring the properties of exponents and square roots.
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