Solve Nested Exponents: Simplifying (8^5)^10 Using Power Rules

Power Rules with Nested Exponents

Insert the corresponding expression:

(85)10= \left(8^5\right)^{10}=

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1

Understand the problem

Insert the corresponding expression:

(85)10= \left(8^5\right)^{10}=

2

Step-by-step solution

To simplify the expression (85)10\left(8^5\right)^{10}, we'll apply the power of a power rule for exponents.

  • Step 1: Identify the given expression.
  • Step 2: Apply the power of a power rule, which states that (am)n=amn(a^m)^n = a^{m \cdot n}.
  • Step 3: Multiply the exponents to simplify the expression.

Now, let's work through each step:
Step 1: The expression given is (85)10\left(8^5\right)^{10}.
Step 2: We will use the power of a power rule: (am)n=amn(a^m)^n = a^{m \cdot n}.
Step 3: Multiply the exponents: 510=505 \cdot 10 = 50.

Thus, the expression simplifies to 8508^{50}.

The correct simplified form of the expression (85)10\left(8^5\right)^{10} is 8508^{50}, which corresponds to choice 2.

Alternative choices:

  • Choice 1: 8158^{15} is incorrect because it misapplies the exponent multiplication.
  • Choice 3: 858^5 is incorrect because it does not apply the power of a power rule.
  • Choice 4: 828^2 is incorrect and unrelated to the operation.

I am confident in the correctness of this solution.

3

Final Answer

850 8^{50}

Key Points to Remember

Essential concepts to master this topic
  • Power Rule: When raising a power to a power, multiply the exponents
  • Technique: (85)10 (8^5)^{10} becomes 85×10=850 8^{5 \times 10} = 8^{50}
  • Check: Count total multiplications: 5 exponents taken 10 times = 50 ✓

Common Mistakes

Avoid these frequent errors
  • Adding exponents instead of multiplying
    Don't add 5 + 10 = 15 to get 815 8^{15} ! This confuses the power rule with the product rule. The power rule multiplies exponents, so always calculate 5 × 10 = 50 for 850 8^{50} .

Practice Quiz

Test your knowledge with interactive questions

\( 112^0=\text{?} \)

FAQ

Everything you need to know about this question

Why do I multiply the exponents instead of adding them?

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When you have nested exponents like (85)10 (8^5)^{10} , you're multiplying 85 8^5 by itself 10 times. This means the base 8 appears 5 × 10 = 50 times in the multiplication!

How is this different from 85×810 8^5 \times 8^{10} ?

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Great question! 85×810 8^5 \times 8^{10} uses the product rule where you add exponents: 5 + 10 = 15. But (85)10 (8^5)^{10} uses the power rule where you multiply exponents: 5 × 10 = 50.

What if I forget which rule to use?

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Look for parentheses! If you see (am)n (a^m)^n with parentheses, use the power rule and multiply. If you see am×an a^m \times a^n without nested parentheses, use the product rule and add.

Can I work this out step by step instead?

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Yes! (85)10 (8^5)^{10} means 85×85×85... 8^5 \times 8^5 \times 8^5... ten times. Using the product rule repeatedly: 5+5+5...+5 (ten times) = 5×10 = 50. You get 850 8^{50} !

Does this work with any base and exponents?

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Absolutely! The power rule (am)n=am×n (a^m)^n = a^{m \times n} works for any numbers. Just remember to multiply the exponents when you see nested parentheses.

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