Find the exact value of the logarithmic expression without using a calculator:

[tex]\[
\log_4 2 + \log_4 512
\][/tex]



Answer :

Certainly! Let's find the exact value of the logarithmic expression [tex]\(\log_4 2 + \log_4 512\)[/tex] step by step.

### Step 1: Apply the Logarithmic Property

First, let's use the property of logarithms that states [tex]\(\log_b(x) + \log_b(y) = \log_b(x \cdot y)\)[/tex].

So, we can combine the given logarithms into a single logarithm:
[tex]\[ \log_4 2 + \log_4 512 = \log_4 (2 \cdot 512) \][/tex]

### Step 2: Multiply the Arguments

Next, we need to calculate [tex]\(2 \cdot 512\)[/tex]:
[tex]\[ 2 \cdot 512 = 1024 \][/tex]

Therefore,
[tex]\[ \log_4 (2 \cdot 512) = \log_4 1024 \][/tex]

### Step 3: Express the Argument as a Power of the Base

Now, we notice that 1024 can be expressed as a power of 4. Specifically, [tex]\(1024 = 4^5\)[/tex]. This is because when you repeatedly multiply 4 five times, you get:
[tex]\[ 4^5 = 4 \times 4 \times 4 \times 4 \times 4 = 1024 \][/tex]

### Step 4: Simplify the Logarithm

By the properties of logarithms, [tex]\(\log_b(b^x) = x\)[/tex]. Hence,
[tex]\[ \log_4 1024 = \log_4 (4^5) \][/tex]
[tex]\[ \log_4 (4^5) = 5 \][/tex]

### Final Answer

Thus, the exact value of the original logarithmic expression [tex]\(\log_4 2 + \log_4 512\)[/tex] is:
[tex]\[ 5 \][/tex]