Mastering Logarithms: Cracking Base 4 with Style

Solve log base 4 of 1/8

• A. -3
• B. -2
• C. -1
• D. 0

Answer: (A)

To solve this equation, we need to rewrite the given expression as an exponential form. Log base 4 of 1/8 is equivalent to saying "What power do we need to raise 4 to, in order to get 1/8?". This can be written as 4^x = 1/8. The answer can then be found by setting 4^x equal to 1/8 and solving for x. If we follow this process, we can see that x must equal -3, making option A the correct answer. The other options are incorrect because they do not represent the correct solution to the equation. Option B is incorrect because -2 is not a valid answer when solving 4^x = 1/8. Option C is incorrect because -1 is not a valid answer when solving 4^x = 1/8. And

Have you ever looked at a logarithm and thought, “What on Earth is going on here?” You're not alone! Logarithms can seem a bit intimidating at first, but they’re just another tool in your algebra toolkit. And today, we’re diving into a specific example: solving log base 4 of ( \frac{1}{8} ). Let’s break it down together!

Logarithms: What’s the Fuss?

So, what exactly is a logarithm? At its core, it’s all about the question: “To what exponent do we raise a specific base to obtain a certain number?” In this case, we’re asking, “What power do we need to raise 4 to, in order to get ( \frac{1}{8} )?” A bit puzzling, right?

Turning Up the Heat with Exponential Form

To tackle this log problem, we can rewrite it in an exponential form. Instead of looking at log base 4 of ( \frac{1}{8} ), we can translate it to ( 4^x = \frac{1}{8} ). Now, we’re in familiar territory where we can work our way to a solution.

Here’s the thing: ( \frac{1}{8} ) can be rewritten as ( 4^{-3} ) because ( 4^3 = 64 ), and when we take the reciprocal (because we have a fraction), we get ( \frac{1}{64} ). Wasn’t that a fun little sidestep?

Now, we’ve got the equation:

[

4^x = 4^{-3}

]

When the bases are the same, we can simply set the exponents equal to each other; so, ( x = -3 ). Boom! There it is—our answer is option A: -3.

Examining the Other Choices

Now, let’s take a moment to check the other answer choices. This part's crucial because, in a test setting, knowing why an answer is correct—or incorrect—can save your grade!

• Option B: -2 – not quite right. If we put -2 back in, (4^{-2} = \frac{1}{16}), which is not ( \frac{1}{8} ).

• Option C: -1 – again, let’s check that out. ( 4^{-1} = \frac{1}{4} ); nope, not our case either.

• Option D: 0 – oh no, that just gives us ( 4^0 = 1). A far cry from ( \frac{1}{8} ).

Each incorrect answer is a teachable moment! Understanding why an answer doesn’t work can sometimes be even more valuable than just knowing the right one.

Wrapping It Up

So, as we wrap up this little algebra adventure, remember, logarithms like log base 4 aren’t as scary as they might seem. They’re just a way of asking about exponents, bringing together a world of relationships in mathematics.

As you prepare for your college algebra exam, embrace the challenge! Practice these concepts, and soon you’ll find yourself breezing through logarithmic problems with confidence, ready to tackle whatever comes your way in the world of numbers!

Ready to cut through those logarithms? Let’s go!