Solve (a×b×c×4)^7: Multiple Variable Expression with Seventh Power

Power Rules with Multiple Variable Products

(a×b×c×4)7= (a\times b\times c\times4)^7=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:08 Let's Simplify
00:11 let's use the power rule for multiplication.
00:15 Any multiplication raised to the power N
00:19 equals each factor raised to that same power N.
00:24 Let's use this formula in our exercise.
00:27 We'll expand the brackets and raise each factor to the correct power.
00:31 And that's how we solve the problem!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

(a×b×c×4)7= (a\times b\times c\times4)^7=

2

Step-by-step solution

We use the formula:

(a×b)x=axbx (a\times b)^x=a^xb^x

Therefore, we obtain:

a7b7c747 a^7b^7c^74^7

3

Final Answer

a7×b7×c7×47 a^7\times b^7\times c^7\times4^7

Key Points to Remember

Essential concepts to master this topic
  • Power Rule: When raising a product to a power, each factor gets the exponent
  • Technique: Apply exponent 7 to each factor: a, b, c, and 4
  • Check: Count factors: original has 4 factors, answer should have 4 factors with exponent 7 ✓

Common Mistakes

Avoid these frequent errors
  • Only applying the exponent to some factors
    Don't raise just one or two factors to the 7th power while leaving others unchanged = incomplete answer! This violates the fundamental power rule for products. 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 does every factor get the exponent 7?

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The power rule for products states that (a×b)n=an×bn (a \times b)^n = a^n \times b^n . When you raise a product to a power, every factor inside the parentheses must be raised to that power.

What if I forgot to raise 4 to the 7th power?

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That's a common mistake! Remember that 4 is also a factor in the product, so it needs the exponent 7 just like the variables. 47=16,384 4^7 = 16,384 - quite different from just 4!

Do I need to calculate what 4^7 equals?

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Not necessarily! The answer a7×b7×c7×47 a^7 \times b^7 \times c^7 \times 4^7 is perfectly acceptable. You can leave 47 4^7 as is unless specifically asked to calculate the numerical value.

How is this different from (a+b+c+4)^7?

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Huge difference! With multiplication (a×b×c×4)7 (a \times b \times c \times 4)^7 , each factor gets the exponent. With addition, you'd need to use the binomial theorem - much more complex!

Can I write the answer in a different order?

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Yes! Since multiplication is commutative, you can write 47×a7×b7×c7 4^7 \times a^7 \times b^7 \times c^7 or any other order. The mathematical meaning stays the same.

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