Solve (4×9×11)^a: Finding the Power of a Product

Power Properties with Multiple Factors

Solve the following exercise:

(4×9×11)a (4\times9\times11)^a

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:07 Let's begin!
00:10 We'll use the formula for powers with products.
00:13 When a product is raised to a power, say N,
00:17 each factor is also raised to that same power, N.
00:22 We're using this idea in our exercise.
00:25 Let's expand the brackets and apply the power to each factor.
00:29 And that's how we solve the question!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

(4×9×11)a (4\times9\times11)^a

2

Step-by-step solution

We use the power law for a multiplication between parentheses:

(zt)n=zntn (z\cdot t)^n=z^n\cdot t^n

That is, a power applied to a multiplication between parentheses is applied to each term when the parentheses are opened,

We apply it in the problem:

(4911)a=4a9a11a (4\cdot9\cdot11)^a=4^a\cdot9^a\cdot11^a

Therefore, the correct answer is option b.

Note:

From the power property formula mentioned, we can understand that it works not only with two terms of the multiplication between parentheses, but also valid with a multiplication between multiple terms in parentheses. As we can see in this problem.

3

Final Answer

4a×9a×11a 4^a\times9^a\times11^a

Key Points to Remember

Essential concepts to master this topic
  • Power Law: Distribute the exponent to each factor inside parentheses
  • Technique: Transform (4×9×11)a (4×9×11)^a to 4a×9a×11a 4^a×9^a×11^a
  • Check: Each factor gets the same exponent 'a' when distributed ✓

Common Mistakes

Avoid these frequent errors
  • Only applying the exponent to one or some factors
    Don't leave some factors without the exponent like 4a×9×11 4^a×9×11 = wrong distribution! This violates the power law and creates incorrect expressions. Always apply the exponent to every single factor inside the parentheses.

Practice Quiz

Test your knowledge with interactive questions

Choose the expression that corresponds to the following:

\( \)\( \left(2\times11\right)^5= \)

FAQ

Everything you need to know about this question

Why do I need to apply the exponent to each factor separately?

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The power law states that (a×b×c)n=an×bn×cn (a×b×c)^n = a^n×b^n×c^n . This works because when you multiply the same expression 'n' times, each factor appears 'n' times in the multiplication.

What if I first multiply the numbers inside parentheses?

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While 4×9×11=396 4×9×11 = 396 gives you 396a 396^a , this isn't the simplified form the question asks for. The distributed form 4a×9a×11a 4^a×9^a×11^a shows the power property clearly.

Does this work with any number of factors?

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Yes! Whether you have 2 factors like (x×y)n (x×y)^n or 10 factors, the exponent distributes to every single factor inside the parentheses.

Can I use this rule backwards too?

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Absolutely! If you see 35×75×25 3^5×7^5×2^5 , you can factor it as (3×7×2)5 (3×7×2)^5 . This reverse power law helps simplify expressions.

What if the exponent is a fraction or negative?

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The power law works with any exponent! Whether 'a' is positive, negative, fractional, or even irrational, you still distribute it to each factor: (4×9×11)2=42×92×112 (4×9×11)^{-2} = 4^{-2}×9^{-2}×11^{-2} .

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